Baghdad, Iraq ? Saboteurs brought a trainload of U.S. Army supplies to a fiery halt west of Baghdad on Thursday, as a Ramadan campaign of terror bombs and escalating attacks spurred a new Iraq pullout by international aid groups.

An explosion late Thursday rocked a row of shops in Baghdad’s Old City, killing two people, according to police.

Many Baghdad parents apparently were keeping their children home from school out of fear of further bombings like the four Monday that killed three dozen people and wounded more than 200 across the capital.

The police, prime targets in the bombings Monday, were targeted again Thursday, when officers intercepted a motorist who tried to toss a hand grenade into a police station on the edge of Baghdad’s heavily guarded “green zone,” the headquarters enclave for the U.S. occupation.

One leaflet on the streets, purporting to be from Saddam Hussein’s Baath Party, called for a general strike Saturday through Monday “to prove to our enemy that we are united people.”

The identity of those swarming over the sabotaged train Thursday was clear: they were Iraqis from the Fallujah area, 35 miles west of Baghdad, who fell upon the crippled train to loot it of computers, tents, bottled water and other Army supplies.

The goods had been bound for the town of Haditha, 100 miles up the Euphrates River from Fallujah, when a makeshift bomb exploded.