Two people were killed and at least four others wounded, including a police officer, in a shooting Monday at a mall in the US state of Idaho, police said.

The incident occurred in the afternoon at the Boise Towne Square Mall in the city of Boise.

At a press conference, Boise Police Chief Ryan Lee said the police are still working with hospitals as well as investigators to notify the families of the victims.

One person is in custody, said the Boise Police Department.

Idaho Governor Brad Little said the state is ready to assist Boise police in the investigation into the shooting.

"Those injured in today’s unthinkable shooting at the Boise Towne Square Mall are in my prayers. The State of Idaho stands prepared to assist the Boise Police Department as they investigate the shooting," Little tweeted.

In an earlier tweet, the department said police officers were responding to a report of shots fired at the mall on North Milwaukee Street and asked people to avoid the area./agencies