Bobby Brown briefly appears at Houston funeral

NEWARK, N.J. – Whitney Houston's ex-husband, Bobby Brown, has briefly appeared at her funeral before leaving.

Brown arrived as the service began. He walked to the casket, touched it and walked to the back of the New Jersey church Saturday.

Security guards were saying Brown would be seated but the people he arrived with had to sit apart from him. Instead, Brown left and appeared upset.

A message seeking confirmation of whether Brown was invited to the private service was sent to Houston's publicist.

Houston died Feb. 11. A cause of death hasn't been determined.

Houston and Brown were married 15 years and have one daughter. In 2003, police responding to a domestic violence call about Brown found Houston with a cut lip and bruised cheek. Their tumultuous relationship ended in 2007.