Bagram, Afghanistan ? U.S. Special Forces soldiers found a cache of small and heavy arms buried in their own compound in central Afghanistan’s Uruzgan province, the U.S. command reported Monday.

It said the weapons were found at the compound in Des Rawat district, the same area where a U.S. air attack on villages July 1 killed and wounded dozens of Afghan civilians. That attack, in which Afghan officials say 48 people were killed, almost all of them women and children, is being investigated jointly by the U.S. military and Afghan authorities.

Special Forces contingents have been pressing a hunt for Taliban and al-Qaida holdouts in mountainous Uruzgan, home region of ousted Taliban leader Mullah Mohammad Omar. He remains at large – in Uruzgan, according to persistent reports.

The Americans found, among other things, an 82mm mortar, a 75mm recoilless rifle, 20 grenades, seven rocket-propelled grenades, 28 cases of rifle ammunition and eight cases of machine-gun ammunition, reported the Army spokesman’s office at the U.S. base here. Who buried the weapons was not immediately determined.

In addition, a further search of a compound that was the scene of a weekend firefight in southeastern Afghanistan turned up five cases of rifle ammunition, three rocket-propelled grenades, two rockets and two grenades, the U.S. military reported.

Five American soldiers were wounded, two of them seriously, in what U.S. spokesmen described as an ambush at the compound. Three “enemy” gunmen were killed, as were two Afghan militia fighters working with the Americans, the U.S. command said.

Col. Roger King, chief spokesman here, said the identities of the three dead gunmen had still not been determined as of Monday. A fourth gunman was severely wounded, but he remained unconscious and had provided no information, King said.