At least 11 people were shot and wounded on a weekend marked by Mayor Jim Kenney’s visit Saturday night to Southwest Philadelphia to show support for anti-violence measures following the Father’s Day weekend mass shooting at a street party in that section of the city.

All the victims were males, and included four adults wounded in the same shooting. Despite the violence, the weekend stood in sharp contrast to the one before when 28 people were shot, five fatally, around the city.

The gunfire began at 10:25 p.m. Saturday with a quadruple shooting in South Philadelphia on the 2300 block of Moore Street. Police said the victims were a 23-year-old shot twice in the left hip and once in the lower back, a 27-year-old shot once under the left arm and once in the left flank, a 23-year-old shot in the right elbow, and another 23-year-old shot in the right ribs and knee.

The first three men were taken to Penn Presbyterian Medical Center, the fourth to Methodist Hospital, with plans to transfer him to Jefferson University Hospital. The man shot in the back was in critical condition, the others in stable condition, police said.

The next reported shooting was at 10:34 p.m. Saturday on the 100 block of West Cambria Street on the border of the North Philadelphia neighborhoods of Fairhill and West Kensington. Police said an 18-year-old was shot in the upper left hip. He was taken to Temple University Hospital in stable condition.

Less than an hour later and a short distance away, a 55-year-old was shot in the back and left wrist on the 2800 block of North Swanson Street in Kensington at 11:24 p.m. Police said he was taken to Temple in stable condition.

At 12:47 a.m. Sunday, a 24-year-old was shot once in the lower back on the 2600 block of West Somerset Street in North Philadelphia. Police said he was taken to Temple in critical condition.

And at 1:24 a.m., police said, a 21-year-old was shot five times — twice in the thigh, and once each in the chest, buttocks and back — on the 700 block of 46th Street in West Philadelphia. He was taken by private car to Penn Presbyterian in critical condition, police said.

A ninth victim was reported shot at 3:23 p.m. on the 2300 block of St. Albans Street. The 39-year-old man was shot six times, with injuries to the chest and both legs. He was in critical condition at Penn Presbyterian Hospital, police reported.

About two and a half hours later Sunday, a 16-year-old was reported shot in the right leg on the 3000 block of N. 6th Street. Police reported him in stable condition at Temple University Hospital Sunday night.

Around 11 p.m., about a dozen shots were fired in a rear driveway in Northeast Philadelphia’s Mayfair section, seriously wounding a 21-year-old man, police said. The man, who had been shot in the back, was able to run away and arriving officers found him on porch on the 3100 block of Barnett Street. Police took him in a patrol car to Jefferson Torresdale Hospital.

No arrests were reported in any of the shootings, and none were fatal.

Last weekend, which included Father’s Day, 28 people were shot — five fatally — in 19 cases across the city.

Through Thursday, there were 631 shooting victims in the city since the start of the year, an increase of 6 percent over the same period last year, according to police statistics.

Staff Writer Jason Laughlin contributed to this report.