"Security then prevented me from attempting to see my daughter Bobbi Kristina. In light of the events, I gave a kiss to the casket of my ex-wife and departed as I refused to create a scene. My children are completely distraught over the events.
"This was a day to honour Whitney. I doubt Whitney would have wanted this to occur. I will continue to pay my respects to my ex-wife the best way I know how."
Mourners at the funeral said the clearly-distraught star - who married Whitney in 1992 and divorced in 2007 - spent 15 minutes by her casket before leaving the service.
One onlooker told Usmagazine.com: "He was allowed to go in, pay his respects and then he had to leave. He was red-eyed going up to the casket and then left. He was there for 15 minutes."
Meanwhile, Houston is being buried today at the cemetery in Westfield, New Jersey where her father was interred in 2003.
Onlookers were gathering along the route to her gravesite as the police-escorted motorcade headed toward it and the hearse carrying her casket entered the cemetery.
TMZ.com reported that 10 security guards are keeping watch over the coffin, but immediate family members will be allowed to see her for the last time before she is finally laid to rest.
- BANG! Showbiz with AP