NEW YORK (AP) — A would-be suicide bomber’s rush-hour blast in the heart of the New York City subway system failed to cause the bloodshed he intended, authorities said, but it gave new fuel to President Donald Trump’s push to limit immigration.

Hours after Monday’s explosion in an underground passageway connecting two of Manhattan’s busiest stations, Trump cited the background of the bomber in renewing his call for closer scrutiny of foreigners who come to the country and less immigration based on family ties.

The man arrested in the bombing, Akayed Ullah — who told investigators he wanted to retaliate for American action against Islamic State extremists — came to the U.S. from Bangladesh in 2011 on a visa available to certain relatives of U.S. citizens. He was charged this morning by New York police with making a terroristic threat and weapon possession. Federal charges are expected later.

“Today’s terror suspect entered our country through extended-family chain migration, which is incompatible with national security,” Trump said in a statement that called for various changes to the immigration system.

Earlier, White House spokeswoman Sarah Huckabee Sanders said Trump’s proposed policies “could have prevented this.”

In a scenario New York had dreaded for years, Ullah strapped on a crude pipe bomb with Velcro and plastic ties, slipped unnoticed into the nation’s busiest subway system and set off the device, authorities said.

The device didn’t work as intended; authorities said Ullah, 27, was the only person seriously wounded. But the attack sent frightened commuters fleeing through a smoky passageway, and three people suffered headaches and ringing ears from the first bomb blast in the subway in more than two decades.

Ullah was being treated for burns to his hands and abdomen but spoke to investigators from his hospital bed.

He was “all over the place” about his motive but indicated he wanted to avenge what he portrayed as U.S. aggression against the Islamic State group.