(Updates with deaths of two police in another bomb)

KABUL, April 23 (Reuters) - A roadside bomb killed five Afghan intelligence officials and a similar device killed two police on Monday, the government said, the latest in a wave of blasts blamed on resurgent Taliban guerrillas.

The officials were travelling in a car in the eastern province of Nuristan when a remote-controlled bomb went off, an official in the province said.

The second blast occurred in the southern province of Zabul and also involved a vehicle, provincial officials said.

At least 11 people, including four security agents, were killed in three separate blasts on Sunday.

Also on Sunday, Taliban insurgents beheaded an intelligence officer in Ghazni province, southwest of the capital, Kabul, a government official said.

Ousted from power in 2001, the Taliban have threatened to step up their campaign against foreign forces and the Western-backed government this year.

Taliban commanders have said thousands of suicide bombers are waiting for orders to strike across the country.

The government and foreign forces say the Taliban are increasingly resorting to suicide and remote-controlled bomb attacks out of desperation.

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