Update: Vancouver Police say they have taken a 14-year-old boy into custody in connection with the incident at about 4:30 p.m. It was not immediately clear whether the boy was armed with a gun.

A report of a suspicious man armed with a handgun sent a Vancouver elementary school into lockdown Monday, according to police.

About 2:30 p.m., a person called 911 and reported that a man had lifted up his shirt and had a handgun on his waistband, said Kim Kapp, a Vancouver Police spokeswoman. The man was spotted on Northeast 122nd Avenue, near Image Elementary School, which is part of the Evergreen School District. He did not threaten anyone with the gun.

Officers responded, and the man ran off. "Something was definitely up," Kapp said.

Police chased after him and searched for him using a police dog. They have not found him, Kapp said.

At 4:30 p.m., the school district announced that the lockdown had been lifted, except for students who were walking home north of the school. Children were escorted to their parents who were waiting to pick them up at the school, the district said.

-- Rebecca Woolington

503-294-4049; @rwoolington