Three rockets were fired Friday at a building in the western Afghan city of Herat that has been leased as the site of a future U.S. consulate, Afghanistan police said.
No casualties were reported.
One rocket hit the building, a former hotel, shattering windows, while the two others landed nearby, said Rahmatullah Sediqi, the deputy provincial police chief in Herat.
While nobody was hurt, police later fired guns in the air to disperse crowds, he said.
The U.S. ambassador to Afghanistan, Karl Eikenberry, on Dec. 16 signed an agreement with the governor of Herat province to lease a hotel to be used as the U.S. consulate.
The site was one of at least two the U.S. planned to open outside Kabul as part of a "civilian surge" to increase its diplomatic presence.
He said no U.S. staff members were inside the building at the time of the attack.
Herat, near the Iranian border, is a comparatively prosperous city that has seen little violence ,although militants operate in surrounding rural districts.