02/14/2013 07:46 am ET Updated Feb 14, 2013

Teen Shot Inside Kendall Townhouse (VIDEO)

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A teenage boy is in critical condition after being shot inside his Kendall townhome.

An adult and two other minors were home at the time of the shooting at 11849 SW 99th Lane, but police have so far declined to confirm whether the children were handling the gun.

But Miami-Dade Police spokesman Det. Alvaro Zabaleta did issue a stern warning to parents: "It’s very important for those that own firearms is to educate your teenagers and let them know the dangers that are involved in handling a type of gun," he said.

The Miami Herald reports the boy, who was rushed to Miami Children's Hospital, is just 13 years old. Witnesses told CBSMiami he appears to have been shot in the head.

"I think it was an accident. The boys are good kids," a family friend told NBCMiami.

One child is wounded by gunfire every 31 minutes in the United States, according to a study by the Children's Defense Fund that examined all 34,387 non-fatal shootings of minors between 2008-2009. Another 5,740 children and teens died by guns over the same period.