A Houston police officer is in critical condition after suffering a serious injury at a golf tournament in Cy-Fair Thursday.

Sources tell ABC13 officer Jerry Flores was at the tournament benefiting the Thin Blue Line Law Enforcement Motorcycle Club when the accident happened.

Another officer was driving a golf cart when Flores lost his balance and fell.

Sources say he hit his head and suffered a skull fracture. He was taken to Cy-Fair Medical Center.

Flores was off-duty at the time.

The president of the Houston Police Officers' Union tweeted asking for prayers and saying that a blood drive will be organized for Flores soon.