>> Police in Houston gathering evidence at the scene of a shooting where a cardiologist, who treated former US president George HW Bush, was shot and killed. Authorities say Dr. Mark Hausknecht was riding his bike near Texas Medical Center Friday morning when another man on a bike opened fire, killing the 65 year old doctor.
>> The suspect was on a bicycle as well. Drove past, rode past the doctor, turned and fired two shots. The doctor immediately went down.>> Police say Hausknecht flagged down a passing ambulance for help. He was taken to the hospital where he later died. Investigators are trying to figure out if the shooting was random or targeted.
The search continues for the suspect. A Bush family spokesman says the doctor treated the former president for heart arrhythmia in 2000.