TULSA, Oklahoma - A Tulsa teenager fought off up to four masked men, while at home babysitting his one-year-old sister. Tulsa police said the 15-year-old boy was stabbed in the process.

They said the men broke into the teenager's home Tuesday morning. He went to the hospital after he was stabbed, but his family said he's back home and very scared, as detectives say the robbers are still on the loose.

It's what residents call a typically quiet street; with the exception of a few neighborhood dogs chattering. But a break-in, they say, is uncommon on the sleepy stretch of 2nd Street.

Tuesday wasn't the normal day. It did start out that way, with a 15-year-old boy at home watching his baby sister. But around 9:30 in the morning, police said the teenager noticed a white pickup truck pull up to his house, then saw three or four men jump out and put on masks.

The masked men, one of them armed with a gun according to police, kicked in the back door. At that point, police said the teenager confronted the robbers, got into some kind of fight and was stabbed in the leg with a knife.

Police said the men took off in the truck with two flat screen TVs and a gaming device.

Six Tulsa schools nearby were put on lockdown for about 30 minutes, while police tried to find the armed men.

The little girl was not hurt. And as for the intruders, police said the victim told detectives he didn't recognize them.