Two people are dead and five others have been injured in a mass shooting targeting a family barbecuing outside a home this weekend in San Antonio, Texas, KSAT-TV reports.

The incident, which authorities described as a “drive-by” shooting, occurred around 10:15 p.m. Saturday on the city’s southwest side in the 2500 block of Patron Drive.

Family members were outside the residence when a dark-colored SUV drove past the home and an undetermined number of people fired 20-30 rounds, San Antonio Police Department Chief William McManus said at a press conference.

Six children were at the home when the gunfire broke out but they were inside the residence and were not harmed physically, according to the San Antonio Express-News.

Victims range in age from 20 to mid-40s; five victims are men and two are women.

Two men, whose ages were 45 and 46, were pronounced dead at the scene; the remaining victims were brought to area hospitals, NBC News reports.

Authorities were not able to provide a description of any suspects, but police are working on potential theories about what might have prompted the shooting.

Video from the scene recorded by KSAT-TV shows a massive response from police and medics.

McManus said at the press conference that a “deadly conduct incident” occurred at the same home in May.

“A family was barbecuing out in front of the house and someone drove by and unloaded on them, firing off about twenty or thirty rounds,” McManus told reporters, according to KENS-TV.

“We have seven shots and two dead right now, two females and the remaining five are men in their 20s to early 40s. Back in May, there was a deadly conduct incident at this house, a drive-by, but other than that we don’t have any incidents at this house.”