Two suicide bombers blew themselves up outside an airbase housing a multinational peacekeeping force in Egypt's Sinai peninsula Wednesday.

There were also unconfirmed reports of a separate blast at a police checkpoint in the Nile Delta in the north of the country, but Egypt's Interior Minister Yahya Abdulmageed said that report was false.

The attacks come just two days after a triple bombing killed 24 people at the Sinai beach resort of Dahab.

The Multinational Force and Observers (MFO) is comprised mostly of U.S. troops, but also includes more than two dozen Canadians and soldiers from several other countries.

Security officials said Wednesday's bombers struck about 35 minutes apart near the main MFO base about three miles south of the Rafa border crossing to Gaza in northern Sinai.

A statement from the MFO headquarters in Rome said both suicide bombers died but there were no other casualties.

The force said the first blast occurred at 11 a.m. local time and targeted "an MFO Liaison vehicle" near the main peacekeeping camp at el-Gorah.

It said a Norwegian and a New Zealander were riding in the car with two Egyptian officials when the bomb exploded, but they were not injured.

The second suicide bomber targeted a police vehicle at 11:35 a.m. "at another location in the same general area. We understand that no police injuries were reported," the statement said.

Journalist Wilf Dinnick told CTV Newsnet Wednesday that the blasts took place "despite a huge effort by the Egyptian government to crack down on Islamic militants who are believed to be behind this bombing."

The strike on the MFO in Sinai was the second in less than a year.

In August, a crude roadside bomb blasted a vehicle belonging to peace keepers, slightly wounding two Canadian soldiers.

The MFO of 1,800 peace keepers was set up as part of the 1979 peace treaty between Israel and Egypt that led to Israel's withdrawal from the Sinai.

A total of 10 countries make up the force - the United States, Canada, Australia, Colombia, Fiji, France, Hungary, Italy, New Zealand and Uruguay. Norway also provides the force with three officers, although it is not technically a member.

The force is based in the northern part of the Sinai Peninsula -- just 15 kilometres from the border with Gaza.

The Sinai -- Egypt's desert peninsula that separates the Mediterranean from the Red Sea -- has been hit by a series of Islamic extremist bombings in the past 18 months.