NEW YORK — Survivors, families, investigators and prosecutors are among those who gathered at a memorial Mass marking the 25th anniversary of the first terrorist attack on the World Trade Center.

The service was held St. Peter’s Catholic Church, about a block from the World Trade Center in Manhattan.

Monday is the anniversary of the bomb attack, which killed six people, one of them pregnant.

The 12:18 p.m. blast injured more than 1,000 and forced tens of thousands of people to flee the trade center. The bombing became a harbinger of terror at the twin towers eight years before their destruction on Sept. 11, 2001.

Meanwhile, a moment of silence was held at the Sept. 11 Memorial Plaza, located at ground zero.

The names of the six people killed on Feb. 26, 1993, were read at the ceremony.

Sept. 11 museum president Alice Greenwald says the bombing marked a pivotal moment in the city’s history and the nation’s reckoning with the threat of international terrorism.