The FDNY says they battled a fire on the sixth floor of an apartment building in Brighton Beach at around 4 p.m. on Tuesday.

FDNY Battalion Chief Michael Stone told News 12 they discovered "several burning e-bikes powered by lithium-ion batteries.

“The fire condition wasn’t that severe, but the smoke condition was," Chief Stone added. "The smoke from those lithium-ion batteries, fires, are very toxic. It’s a little bit different from your regular smoke.”

The superintendent of the building told News 12 in Spanish that the tenants in that apartment have caused similar issues in the past.

“We’ve always had problems [with them]. This is the second fire here," Alberto Nando said. “Scooters, batteries, everything’s in there."

FDNY officials say four people were brough to Coney Island Hospital for minor injuries.