At least 5 people were killed in a Tulsa, Oklahoma, hospital campus shooting, police say

At least four people were killed Wednesday in a shooting on a hospital campus in Tulsa, Oklahoma, police said in a news conference Wednesday evening. 

The gunman is also dead, police said. Authorities believe the shooter's gunshot wound was self- 

inflicted, Tulsa Police Department Deputy Chief Eric Dalgleish said in the news conference. 

Several people were also wounded, though no one has life-threatening injuries, police Capt. Richard Meulenberg told CNN on Wednesday night. 

Dispatchers received a call about an active shooter at the Natalie Medical Building, a physicians' 

office building on the St. Francis Hospital campus, shortly after 4:50 p.m. local time, Dalgleish said. 

Officers responded to the scene within minutes and made contact with victims and the suspect roughly five minutes later, Dalgleish said