Online threats heighten tensions:

The University of Missouri said it has increased security and is investigating online threats after weeks of protests over racial tensions on campus culminated in the departure of two senior university officials.

A post Tuesday night on the college’s website said campus police are “aware of social media threats” and are investigating. It came after at least two users posted threats on the anonymous location-based messaging app Yik Yak.

One user threatened to “shoot every black person I see.”

Campus police Capt Brian Weimer told The Associated Press additional officers were already on campus before the university learned of the threats.

A university spokesman couldn’t immediately be reached for further comment, but the school’s online emergency information center tweeted, “There is no immediate threat to campus.”

It has been a tumultuous week for the flagship campus of the University of Missouri system.

The student government president reported in September that people shouted racial slurs at him from a passing pickup

Wolfe