A boy walks near army trucks carrying tanks and vehicles, expecting opposition against militants

REUTERS

Egypt's military said on Wednesday it would broaden its offensive against militants in the Sinai Peninsula, a campaign that has raised concerns in Israel about the movement of heavy armour into the area near its border.

After militants attacked and killed 16 border guards on August 5, Egypt launched an operation using the army and police to raid militant hideouts, arrest suspects and seize weapons, including rockets and other arms, that are rife in the area.

Disorder has spread in Sinai since former President Hosni Mubarak's overthrow last year. Analysts say Islamists with possible links to al Qaeda have gained a foothold. This has alarmed Israel, reports Reuters.

Israeli officials have privately voiced concerns about heavy equipment being sent to areas where there are restrictions on weapon deployments under a 1979 peace treaty.

Egypt has sent hundreds of troops, along with tanks, armoured vehicles and helicopters into the North Sinai region since the start of military operations there on August8.

Egyptian President Mohamed Mursi told Reuters on Monday in his first interview with international media that Egypt was committed to all treaties and, without naming Israel, said no other states should worry about its actions in Sinai.

"As of the morning of August 29, in continuation of the military operation, there will be a redeployment of forces in various locations in Sinai to complete the hunt for terrorist elements," the Defence Ministry said in a statement.

A military source told Reuters this would involve spreading security forces over a wider area to root out militants.

The campaign is led by the defence minister and head of the armed forces, General Abdel Fattah al-Sisi, appointed by Mursi in a shake-up of the military top brass on August 12. The Islamist president has promised to restore order.

Sisi briefed Mursi on the Sinai operation on Monday.

The ministry statement on its website said 11 militants had been killed and 23 arrested in the campaign. It said 11 vehicles had been seized, along with ammunition, including five boxes of Israeli-made ammunition, but did not give details.

The 1979 peace treaty limits the military presence in the desert peninsula though in recent years Israel has agreed to allow Egypt to deploy more forces there to stem weapons smuggling by Palestinian gunmen and crime.

An Egyptian security source said on Wednesday tanks were being withdrawn from the border area in a move that could calm Israel's concerns. Three other security sources confirmed this and said the tanks were being moved to another part of Sinai, without giving further details.