Two men blew themselves up in Egypt's north Sinai Wednesday, one near an airport used by an international observer force and one near the northern town of El Arish, security sources said.

The bombs, which followed three deadly explosions in the east Sinai resort of Dahab on Monday, killed only the bombers, an Interior Ministry statement said.

It was not immediately clear if all the incidents were related but most members of the group blamed for attacks in Sinai over the past two years came from the El Arish area.

A spokesman for the Multinational Force and Observers (MFO) group, which supervises the Israeli-Egyptian peace treaty, said the first bomber appeared to target two of its vehicles but there were no MFO injuries.

The second man blew himself next to a police car outside a police station in Sheikh Zuwayed, near the northern coast town of El Arish. The car was empty and there were no other casualties, the security sources said.

The two suicide attacks targeting the MFO base were the second of its kind in about eight months.

On Aug. 15, 2005, a remote-controlled bomb went off near an MFO camp and injured two female MFO members.

The MFO is an independent peacekeeping mission created as a result of the 1978 Camp David Accords and the 1979 peace treaty between Egypt and Israel.

Various nations have contributed military and civilian personnel to the mission.

Currently, the MFO maintained a 1,800-strong force from a total of 11 countries, namely, Australia, Canada, Colombia, Fiji, France, Hungary, Italy, New Zealand, Norway, the United States and Uruguay.

The office of the governor of Sharkia province in the east of the Nile Delta denied reports of a third incident in the Sharkia town of Bilbeis.

Police sources had said a group of gunmen ambushed police in Bilbeis, leading to an exchange of fire.

The three almost simultaneous bombs in Dahab on Monday killed 18 people, including four foreigners, and injured scores.

The Dahab explosions resembled other attacks attributed to a Sinai-based group which has bombed two other resorts on the east coast over the last two years.

(China Daily, Xinhua News Agency, April 27, 2006)