No one was hurt when assailants in a passing car fired shots at the Colombian Embassy in San Jose, Costa Rica's security minister said Friday.

Six shots were fired, apparently from an AK-47 assault rifle, Maria Zamora told a press conference.

Four of the shots hit a guardhouse on the grounds and two struck the embassy itself.

"Fortunately, there are no casualties," the minister said.

The attack occurred around 2:40 a.m. Friday and the assailants were traveling in a gray sedan, according to the official report.

The embassy remained cordoned off to allow investigators to collect evidence. Colombian Ambassador Hernando Herrera was present early Friday to view the damage, but did not talk to reporters.

Costa Rican authorities did not suggest a motive for the attack on the embassy, which is located in a residential neighborhood of San Jose. EFE