A Westport man was one of two suspects charged early Saturday with robbing a Trumbull couple in their driveway when they returned home, police said.

Sean Michael Delaney Kosmicki, 20, of Lockwood Circle, Westport, was charged with fifth-degree larceny, two counts of first-degree robbery, interfering with an officer and possession of narcotics. His bond was set at $250,000. Sergio Paul, 19, of Grayrock Road, Trumbull, was charged with sixth-degree larceny, possession of narcotics and conspiracy to commit first-degree robbery. His bond was set at $150,000.

The husband and wife had just arrived in the driveway of their home and left their vehicle when they were confronted by a single male wearing a hoodie and a covering across part of his face, Trumbull police said. Holding a weapon, he demanded all of the couple's property before fleeing on foot, police said. One of the victims called 911, and several officers and a K-9 unit were dispatched to the home.

The K-9 unit tracked the suspect to a neighboring home on Grayrock Road. There, officers saw the suspect matching the description given by the couple, rummaging through the purse he had just taken, police said.

Catching sight of the officers, the suspect, later identified as Kosmicki, ran into a furnace room in the basement. Officers issued orders for the man to surrender several time, but he did not comply, according to the report. Cyrus, the K-9, was then released and forced Kosmicki -- who was bitten in the knee by the dog -- to surrender. His wound was treated at a hospital and he was then released back to police custody.

While searching for other possible suspects in the house, officers located Paul, who lives at the Grayrock Road home, and found him in possession of stolen items from the robbery, according to the report. Paul was also taken into custody.

All items taken were recovered, along with a knife used in the robbery, police said.