DENVER (AP) -- A pediatric cardiologist in Arizona is being investigated by his employer over tweets to a Denver Post reporter who was friends with a woman killed in the Colorado theater shooting.

According to KUSA-TV in Denver, reporter Adrian Dater retweeted the comments that appear to have been in response to something he wrote about the Phoenix Coyotes hockey team.

The Twitter user BabyDocScott tweeted "Go catch a movie in Aurora" and said Dater could "join Jessica for all I care." Dater was friends with Jessica Ghawi, who was killed in the Aurora movie theater shootings July 20.

Dr. Scott Schnee at Banner Health in Phoenix didn't return a call from KUSA, and his Twitter account is now disabled.

Banner Health issued a statement saying it's gathering information.