A heavy police presence during Monday’s SWAT standoff in Normal Heights. (Photo by Adrian Childress/Times of San Diego)

A man suspected of firing a shot at San Diego police officers who responded to his call for help in Normal Heights was found dead inside his home Monday, according to law enforcement.

Police were called around 3:40 p.m. to a house in the 4400 block of 40th Street, near Interstate 5, said acting Sgt. Colin Steinbroner of the SDPD Media Services Unit.

“Officers responded to a mental health distress call placed by the resident on himself,” Steinbroner said. “Officers approached the residence and knocked on the front door. They heard what they believed to be a gunshot, though they did not know where the round went.

The officers withdrew safely and requested additional resources, treating the man as a barricaded suspect. A SWAT team was called to the scene to attempt to communicate with him.

Officers heard a suspected shot when they responded to the distress call. (Photo by Adrian Childress/Times of San Diego)

Police later located the man dead inside the residence. No officers were injured and the circumstances surrounding the man’s death were under investigation.

City News Service contributed to this article.