HAVANA — Members of an American humanitarian aid group arrived in Cuba on Saturday in defiance of U.S. law and wearing T-shirts calling for “regime change” in the United States.

About 120 volunteers with Pastors for Peace flew in from Tampico, Mexico, where they had loaded a caravan of 12 vehicles filled with goods including medicine, computers and bicycles onto boats bound for Cuba — all in violation of a long-running U.S. trade embargo.

“We know in our hearts and in our heads ... that the blockade is immoral, is illegal, is illogical and is unjust,” said the Rev. Lucius Walker, a Baptist minister from New Jersey who founded Pastors for Peace.

The volunteers, who ranged in age from 10 to 91, came in from the United States and six other countries. They wore T-shirts reading “Regime Change in the US — Not in Cuba.”

The Americans among the bunch were defying new U.S. measures that severely limit travel to the island.

“I think it’s absolutely imperative for our citizens to claim their rights,” said Alfred Dale, 78, a retired pastor from Bellingham, Wash. “If we don’t claim them, we lose them.”

The U.S. embargo against Cuba, which aims to squeeze the island’s economy and push out Cuban President Fidel Castro, is in its fourth decade.

A new round of U.S. measures that took effect June 30 aims to further pressure Cuba’s economy by cutting the amount of cash coming in from the United States and limiting visits to the island by cultural and academic groups as well as Cuban-Americans.

The relief trip marked the 14th straight year that Pastors for Peace has sought to bring supplies to Cuba in spite of the embargo. The group violates the embargo by refusing to apply for documentation to export to Cuba and by using Mexico to bypass U.S. restrictions to the island.