embassy and in washington, foreclosures say no american staff were hurt by this quote, cowardly attack. we will take all necessary steps, in the only to ensure the safety of our people, but to secure the area and to ensure that those who perpetrated this attack are dealt with. >> reporter: n.a.t.o. helicopters provided air support while embassy security reportedly opened fire on the militants. afghan forces sought out the remaining gunman who holed themselves up in a building across the road and n.a.t.o. said it was a small group of fighters involved at the embassy and more militants targeted the afghan security operations. and the taliban claims immediate responsibility, leaving n.a.t.o., nor the afghans, how many of their soldiers were involved. bret, one lone gunman remains in that building across the road from the u.s. embassy. he stopped throwing grenades,