DENVER (CBS4) – Police are investigating the killing of a clerk at a 7-Eleven store.

(credit: CBS)
It happened early Friday morning at 17th Street and Welton Street early Friday morning.
Derek Sorenson, 29, was killed by a sharp object, according to Denver’s coroner.
Police put out a surveillance picture of the suspect they are looking for.

(credit: Denver Police)
Authorities so far haven’t released a motive for the killing.