CAIRO -- U.S. and Egyptian authorities are taking steps to boost security for Americans here after a spate of suicide attacks in Saudi Arabia and Morocco, a U.S. Embassy spokesman said Monday.

"We have received no specific threats regarding American personnel or facilities in Egypt," said the spokesman, who asked not to be named.

However, he added: "In light of recent terror attacks, we felt it was prudent to work with the Egyptian government to strengthen our security posture.

"We have received full cooperation from the Egyptian government on this," the spokesman said.

He had been asked to comment after an AFP reporter observed that Egyptian police on Monday had closed a road in Cairo that runs next to a residential compound housing Americans.

Officers said the closure was a measure to protect Americans living there.

Witnesses, meanwhile, said security had also been tightened around the U.S. Embassy since Sunday.

On May 12, triple suicide bombing attacks against compounds housing foreigners in the Saudi capital Riyadh left 34 people dead, including eight Americans, and more than 190 wounded. Nine suicide bombers were among the dead.

Four days later, a wave of suicide attacks against Jewish targets, a hotel and a busy Spanish restaurant in the Moroccan business hub of Casablanca left 41 people dead and injured a hundred people.

Thirteen suicide bombers were reported to be among the dead there.

Most of those killed were Moroccans but there were also three French and three Spaniards among them.