reports: At least two people were shot Thursday on the campus of Seattle Pacific University, and police were searching for a second gunman after apprehending one suspect.

There were at least four victims, but their conditions, or whether all were shot, was not immediately clear, the Seattle Police Department said on Twitter. They were discovered at Otto Miller Hall, an academic building.

The at-large suspect was described as a white man wearing a long-sleeve blue shirt with vertical stripes, Seattle police said. He is believed to be armed with a handgun.

The university posted online that "the campus is in lockdown due to a shooting in Otto Miller Hall."

Seattle Pacific University, a Christian university, had a 2007 enrollment of just under 4,000 students.

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