A Pentagon official says the U.S. is sending extra troops and support equipment to improve protection for U.S. peacekeepers in the northern Sinai Peninsula, in the aftermath of a roadside bomb attack last week that wounded four U.S. soldiers.

The official said about 75 additional troops are being deployed, including a light-infantry platoon and a surgical team, as well as surveillance equipment and other assets designed to beef up the peacekeepers' self-protection.

The official was not authorized to discuss the details publicly and spoke on condition of anonymity.

The U.S. has about 720 peacekeepers in the Sinai as part of a multinational peacekeeping and observer force that has continually monitored compliance with the 1979 peace treaty between Egypt and Israel.