HUMBLE, Texas – Two juveniles are recovering after four were shot Monday in Humble.

The four were shot in what authorities called a fight among children on Grand Linden Court and Kennemer Drive.

The youngest victim and his brother were innocent bystanders, according to police.

Family members identified them as 6-year-old Daniel Cerda and his brother, 11-year-old Oscar Cerda.

Oscar is expected to be released from the hospital on Tuesday.

Both boys were playing soccer in their front yard when the bullets started to fly.

The boys were shot in the legs and were taken to Texas Children's Hospital.

A friend was with the boys when they were shot.

"When they started shooting, um, I put my head down and my two friends got shot," he said. "They kept saying, 'come and fight me.'"

Investigators said they believe 'they' are rival gang members.

A spokesman for the Harris County Sheriff's Office said a 15-year-old was also shot in the leg.

Medics also took a 16-year-old to the hospital. A bullet grazed his back, officials said.

Harris County Precinct 4 deputy constables and the Sheriff's Office searched Monday for shell casings, bullet holes and any other evidence that would help them track down a gun and a gunman.

Investigators said there was a fight among and 15 juveniles and at least four shots were fired, possibly from multiple guns.

Investigators don't know a motive, but are looking into whether the fight might have been gang-related. Nine people were detained for questioning.

No one has been arrested or charged.

Investigators said they recently received calls from neighbors in the area complaining of gunfire.

They are looking to see if the complaints are related to Monday's shootings.