UPDATE 1-Five police officers shot in Houston

Five Houston police officers were shot on Monday as they attempted to serve a warrant, according to officials and local media.

Their conditions were not immediately disclosed. The site of the shooting was still an active crime scene, Houston police said in a message on Twitter, warning people to avoid the area. A suspect in the shooting was down, Houston Mayor Sylvester Turner said in a message on Twitter.

The policemen were shot as officers from the Houston narcotics division served a warrant, the Houston Chronicle reported, citing an unnamed law enforcement source. One of the officers was airlifted to a hospital, Houston Police Officers' Union president Joe Gamaldi said in a separate tweet.

Four officers who were shot were also hospitalized, Houston police said in a message on Twitter. (Reporting by Alex Dobuzinskis in Los Angeles; editing by Bill Tarrant and Cynthia Osterman)