SUNNYSIDE, Queens (PIX11) — Five contractors were injured when a rebar cage tipped over on them at a Queens construction project Monday morning, according to preliminary information on the investigation, officials said.

First responders arrived at the construction site on 37th Avenue near 48th Street in Sunnyside after receiving a call for help around 11:25 a.m., an FDNY spokesperson said. One worker was seriously hurt and the others suffered minor injuries, according to a spokesperson for New York City Environmental Protection. The extent of their injuries remained unclear.

Work on the city’s third water tunnel is being done at the construction site, the spokesperson said.