(Lockland, OH) -- An apartment complex went up in flames overnight. Residents were seen jumping from windows around 3am from complex at 500 Williams Street. Firefighters say several people were trapped inside. Some were seen jumping from as high as three stories. Two children were rescued. The heat from the fire is too intense to know if anyone else is still trapped inside. Firefighters remain on the scene trying to get the blaze under control. And it's too early to determine a cause.