A robbery on a residential street in Takoma Park, combined with a man’s request that authorities check on his elderly mother, led to three arrests on drug manufacturing charges, the city’s police department said.

It all began Friday, according to a police account, when officers were told of a strong-arm robbery in the 7900 block of Lockney Avenue, which is lined with trees, lawns and modest brick dwellings.

Two male assailants approached the victim, pushed her down and took property from her, the police said.

Often, robbers run away or flee in a vehicle. In this case, police said, one robber went into a house on Lockney, which is west of University Boulevard and New Hampshire Avenue.

The police surrounded the house, which they said belonged to Gregory Brunson, 53.

Brunson, according to the police, asked the officers to go inside “to check on the welfare of his elderly mother.”

In a statement, the police said that officers found four people, all males, in the kitchen.

The officers also saw “drugs and paraphernalia” in plain view and these were impounded, the police said. Then, police said, officers obtained a search warrant and found additional items.

Police said three men, two from Owings Mills and one from Hyattsville, were charged with manufacturing crack cocaine. They said a 16-year-old male from Owings Mills was given a citation for the same charge.

In addition, they said Brunson, the Takoma Park homeowner, was issued a citation alleging marijuana possession and was then released.