MANILA -- It appears Diego Loyzaga is still angry at his father Cesar Montano.

After a string of scathing attacks where he called Montano a liar and a hypocrite, the young actor took another swipe at his dad on Thursday as he posted the results of a drug test he took last year.

Sharing that he came out negative for illegal drugs such as ecstasy and cocaine, Loyzaga wrote: "Test na pinagawa mo sa akin. Ano pa ngayon? O adik pa ako? Gusto mo ng isa para makuntento ka na?"

A photo posted by Diego Loyzaga (@diegoloyzaga) on Feb 8, 2017 at 11:32am PST

Loyzaga earlier said Montano has repeatedly accused him of being a drug addict. He also revealed to his fans that his father rejected him when he was young.

He later took down the posts, saying he was asked to.

Loyzaga is Montano's son with former actress Teresa Loyzaga. He was raised in Australia by Teresa but returned to the Philippines in 2011 to pursue a career in showbiz.

In a sharp contrast to his resentment towards Montano, Loyzaga has nothing but good words for his mother, whom he called an "angel."

"The best parent in the world," he said as he posted a photo of him with Teresa. "I love you more than you know, ma."

A photo posted by Diego Loyzaga (@diegoloyzaga) on Feb 8, 2017 at 1:13am PST

Teresa, in a text message sent to late night talk show "Tonight with Boy Abunda," refused to comment on her son's tirades for now, saying: "Thank you for giving me an opportunity to air my side but at this moment, and as a mother, my priority is my son."