Afghan officials say a compound used by the U.S. Central Intelligence Agency in Kabul came under attack late Sunday.

The officials said gunfire was heard near the Ariana Hotel, the CIA's station in the Afghan capital.

There was no immediate word on casualties.

A U.S. official in Washington confirmed there was an attack on a facility used by American officials in Kabul, saying the investigation was ongoing.

The NATO-led coalition in Kabul confirmed there was gunfire near the hotel but did not provide further details.

The attack comes less than two weeks after militants launched a coordinated assault on several high-profile targets in the capital, including the U.S. Embassy and NATO headquarters. Nine people were killed in a nearly day-long siege.

Earlier Sunday, a suicide bomber blew himself up outside a local police headquarter in eastern Paktika province, killing two policemen and wounding two civilians.

Also Sunday, NATO said two of its service members died in eastern Afghanistan from separate bomb blasts.

A NATO statement also said combined Afghan and coalition forces killed 12 insurgents and captured at least 12 others during security operations across the country Sunday. The statement said that among the captured were several Taliban leaders responsible for conducting ambushes and roadside bomb attacks against Afghan forces.

In the country's central Ghor province, a German tourist and his Afghan companion were killed and two other Afghans were wounded by armed men on motorcycles. Saturday's attack came weeks after unknown assailants killed two German tourists hiking in the mountains near the capital, Kabul.

In a separate development, Afghan President Hamid Karzai has appointed a team to investigate the assassination of former president and head of the nation's peace council, Burhanuddin Rabbani, who was leading efforts to find a political solution to the 10-year war with the Taliban. Mr. Rabbani was killed last week in a suicide attack at his home in Kabul.