Lawrence police have arrested one man they believe was involved in a robbery late Sunday in the 100 block of Arkansas Street, and they’re looking for two more suspects.

A 16-year-old Lawrence girl told police that three men were in her home about 11 p.m. when one of them pulled a gun and ordered her to the floor. The men did not force their way inside, said Lawrence police spokeswoman Kim Murphree.

Ignoring the man, the teen ran after one of the other men who had gone into another room. She yanked off his hooded sweatshirt, causing some of the $1,100 in cash he had taken to fly out its pockets. That man then ran through the front door but lost his shoes outside, police said.

Meanwhile, the 16-year-old said she went into the living room, where the man with the gun tried to fire at her. She said she heard a click but no shots were fired. That man then fled out the front door, she told police.

The girl said her stepbrother initially had been asleep but woke up and had an altercation with the third man before chasing the man out the back door.

About 45 minutes later, police arrested a 19-year-old Lawrence man on charges of aggravated robbery and aggravated burglary. Officers found $55 on the man, who had been walking near Sixth and Maine streets. They recovered no weapon, but Murphree said he is thought to be the man with the gun at the home.

Police also have opened a second investigation in the case.

After obtaining a search warrant for the victims’ residence, officers found $1,102 in cash from a freezer, drug paraphernalia, a set of scales, plastic bags and residue consistent with marijuana, according to a police report.

Police on Monday were still seeking a 23-year-old man and a 19-year-old man in connection with the robbery incident.