SAN JUAN, Puerto Rico (AP) — Puerto Rico nationalist Oscar Lopez Rivera emerged from house arrest Wednesday and was celebrated by supporters after decades in custody, freed in a case that made him a martyr for some but angered those who lost loved ones in a string of bombings.

Wearing black jeans and a shirt decorated with a Puerto Rican flag pin, the 74-year-old left his daughter’s San Juan home escorted by the mayor of Puerto Rico’s capital and New York City Council Speaker Melissa Mark-Viverito.

A celebration for Lopez in a plaza near the University of Puerto Rico drew at least 1,000 people by late afternoon, some embracing and wearing T-shirts reading: “Welcome to your homeland!”

Lopez was considered a top leader of the Armed Forces of National Liberation, or FALN, an ultranationalist Puerto Rican group that claimed responsibility for more than 100 bombings at government buildings, department stores, banks and restaurants in New York, Chicago, Washington and Puerto Rico during the 1970s and early 1980s. The FBI classified the Marxist-Leninist group as a terrorist organization.

The most famous bombing was the still-unsolved 1975 explosion that killed four people and wounded 60 at Fraunces Tavern, a landmark restaurant in New York’s financial district.

Lopez, a Vietnam War veteran who moved from Puerto Rico to Chicago as a child, wasn’t convicted of any role in the bombings that killed six people and injured dozens. But those who lost loved ones hold him responsible.

“This guy was convicted of leading the FALN that murdered people,” said Joseph Connor, whose father, Frank, was killed in the Fraunces Tavern attack.

In an interview with The Associated Press, Lopez said he had no regrets about his involvement with the FALN. But he stressed that “the issue of violence is discarded completely” by Puerto Rican “independentistas” and he described their struggle as a peaceful one for many years.

“Whatever we did, whatever was done, whatever the struggle called for in the 1970s is not there today. We have evolved, the conditions in Puerto Rico have changed,” he told AP.

While some Puerto Ricans support Lopez as a sort of patriot and political prisoner, those seeking independence remain a small group. The option garnered less than 6 percent of the vote in four referendums that Puerto Rico has held on its political status.

Lopez vowed to soon undertake a pilgrimage across the island mired in a decade-long recession to “share ideas and promote unity.” In a written statement, he also blasted “colonialists,” who he described as local elites who “helped Washington and Wall Street” run the island for over a century.

“What quality of life do the colonialists offer the people? All they know how to do is squeeze the last dollar from the pockets of every Boricua who works and sweats for our country,” he said, using the term Puerto Ricans call themselves.

Puerto Rico has been under U.S. jurisdiction since 1898, and its people have been U.S. citizens since 1917. The island is home to numerous military veterans, though Puerto Ricans can’t vote for president and their representative in Congress has no vote. They pay Social Security and Medicare payroll taxes but not federal income tax.

A campaign to free Lopez over the years drew support from Pope Francis, former President Jimmy Carter and Lin-Manuel Miranda, creator of the American musical “Hamilton.”

“He has his champions and his critics, but this much is true: He served a lifetime in prison, including 12 years in solitary confinement. Don Oscar will spend his twilight years on the island for which he sought independence, and this feels fitting,” Miranda said in an email, referring to Lopez with the Spanish honorific of “don.”

Lopez is expected to be feted in Chicago later this week. Supporters also plan to honor him at the June 11 Puerto Rican Day parade along New York’s Fifth Avenue.

Lopez was sentenced to 55 years in prison in 1981 after he was found guilty of seditious conspiracy, armed robbery, a weapons violation and four counts of interstate transportation of stolen vehicles. A federal judge termed him an “unreconstructed revolutionary” and Lopez said Puerto Ricans should fight for their island’s independence “by any means necessary.”

He later faced an additional 15 years in jail after he was convicted of conspiring to escape from prison in Leavenworth, Kansas.

In 1999, President Bill Clinton offered Lopez clemency but the inmate rejected the offer because it excluded two associates who have since been released. Then in 2011, the U.S. Parole Commission denied his request for an early release.

President Barack Obama commuted his sentence in his final days in office, along with clemency for others including Chelsea Manning, the transgender Army intelligence analyst who leaked more than 700,000 U.S. documents.

Lopez was released from prison in Terre Haute, Indiana, and arrived in Puerto Rico in February to serve the remainder of his sentence under house arrest. He stayed with his daughter at her apartment in San Juan’s Santurce district.

He has said that upon returning to Puerto Rico he wanted to spend time with family and create a think tank to work on issues including climate change, the economy and the island’s political status.

The June parade in New York comes on the same day as the latest referendum on Puerto Rico’s status, which is to include three options: statehood, territoriality or independence.

Lopez told AP he believed his compatriots would not opt for statehood and the referendum would be “another exercise in futility.”

He also said in a statement: “I want to make it very clear that independentistas do not hate Americans as our people are constantly being told.”

The island’s previous referendums resulted in no action from U.S. Congress, which has final say on any changes in the island’s political status. In the last one, in 2012, 54 percent said they wanted a change in status. Sixty-one percent who answered a second question said they favored statehood, but nearly 500,000 left that question blank, leading many to question the results.

Associated Press writer Carlos Rivera Giusti reported this story in San Juan and AP writer David McFadden reported from Port-au-Prince, Haiti. AP writer Colleen Long in New York contributed to this report.