A 2-year-old boy was critically burned Saturday after he went down a slide at an elementary school playground in Middle River. Someone had broken into Victory Villa school, stole several bottles of industrial-strength drain cleaner and splashed it all over the playground equipment, authorities said.

The boy suffered second- and third-degree burns mostly on his legs from the cleaner, which contains a strong concentration of sulfuric acid, said Division Chief Michael Robinson of the Baltimore County Fire Department. No one else was injured.

The boy's parents initially took him to Franklin Square Hospital Center after he was burned, and the hospital's emergency room had to be evacuated because they tracked some of the drain cleaner in with them, Robinson said. WBAL-TV 11News reported that the child was "literally dripping"  with sulphuric acid when he was carried into the Franklin Square emergency room.

The boy was then taken to the pediatric burn unit at Johns Hopkins Hospital.

The person or persons responsible will face charges including first-degree assault, burglary and destruction of property, said Sergeant Vickie Warehime, a county police spokeswoman.

"We're very lucky nobody else used that playground today," Warehime said. "We could have had numerous victims."

Someone kicked in the door to a storage room at Victory Villa Elementary School sometime overnight Friday into Saturday, Warehime said. Investigators found that six bottles of drain cleaner had been opened.

Whoever is responsible most likely suffered minor burns to the hands and arms, Warehime said. Anyone with information was asked to call police.

A hazardous materials team cleaned up the playground, using tens of thousands of gallons of water, Robinson said.