A 49-year-old man has been arrested and charged with murder in connection with the shooting deaths of a woman and her son inside a Bronx apartment building. According to police, Antonio Robinson was taken into custody after the FDNY responded to reports of a gas leak at 1763 Fulton Avenue shortly before 7:30 p.m. Saturday night.

Inside the apartment, responders found 50-year-old Sharon Epps and 27-year-old Tyrell Bell, both of whom lived in the building, lying unconscious with gunshot wounds to the head, police said. They were declared dead at the scene.

According to the Post, Epps and Bell were mother and son and were found fatally shot in separate rooms of the same apartment unit.

Police say Antonio Robinson was arrested after fire department personnel responding to a report of a gas leak in an apartment on Fulton Avenue Saturday night found the victims with gunshot wounds to their heads. Robinson reportedly answered the door to the apartment when firefighters first arrived.

"The fire department came and made the discovery. Then I heard people screaming through the intercom. I’m at a loss for words," neighbor Neida Perez, 54, told the tabloid.

"Tyrell would argue with his stepfather a lot. They were always arguing," one nearby resident told the Daily News. "The stepdad said he wished he would get a job. She would argue with him, too. She'd say, 'My son isn't going anywhere. He's staying here. If anyone goes, you go.'"

After being questioned by investigators, Robinson was arrested on Sunday. He faces one count of murder in the first degree, and two in the second. Perez's husband, Edwin, told the Post that Robinson is an alcoholic. “He would argue with the kid a lot," he said. "This is a tragedy. Everybody is heartbroken.”