The son of the Potomac woman who was found slain in her home last week was arrested yesterday and charged in her death, Montgomery County police said.

They said Mark K. Seyed-Makki, 23, of the 9500 block of Newbridge Drive, was charged with first-degree murder and robbery in the death of Shohreh Zahra Seyed-Makki, 54, who was married to Khosrow S. Makki, an ear, nose and throat surgeon.

According to a statement issued last night by police, the victim "did not approve of her son's relationship with his girlfriend."

Police said that the son and his mother "had argued about it repeatedly over several years."

In addition, police said, it was learned that the son "had taken money that his mother had hidden in the home with other valuable items."

According to police, officers and rescue personnel went to the family's home about 6:30 p.m. Thursday for what was described as a "suspicious situation."

The officers found the woman dead.

Police said it had been learned that Seyed-Makki's husband became concerned when she failed to keep a 1 p.m. appointment with him and he was unable to contact her in the late afternoon.

He asked a family friend to go to the house to check on her. The friend found her unconscious and notified police.

The woman was pronounced dead at the house. An autopsy confirmed that she had suffered a blunt-force injury to her body.

Police said the cause of death was "blunt-force trauma" and strangulation.

Neighbors told reporters last week that the family was well-known in the local Iranian community.

They had lived for more than 10 years on Newbridge Drive, according to neighbors. A friend said the Makkis had fled Iran in the early 1980s, the period following the Iranian revolution. The couple also have a daughter, Amanda, 27.