UPDATED 02/23/11 10:25 a.m.

CHICAGO (CBS) — Englewood neighborhood residents were in real danger for a little while, after police found a parked truck containing weapons, ammunition and what appeared to be a grenade.

The police Bomb and Arson Section responded about 11:30 p.m. to the 6700 block of South May Street and found a parked truck with several weapons, including rifles, and ammunition, police News Affairs Officer Hector Alfaro said.

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Police searching the truck also found an item that appeared to be a grenade, but it was not known early Wednesday whether the item was an active grenade, Alfaro said.

There has been no explosion, but nearby residents were told to leave their homes as a precaution as emergency crews investigated, police said. Warming buses were provided for residents.

Police Bomb and Arson officers secured the area, and residents have been allowed to return to their homes as of about 3:50 a.m., Alfaro said.

No one is in custody, he said.

As of 10:25 a.m., police said little additional information was available and they were still waiting on paperwork.

The Sun-Times Media Wire contributed to this report.

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