Monkey on the loose after escaping enclosure at Memphis zoo

MEMPHIS, Tenn. -- Workers are trying to catch a small, "very spirited" monkey that escaped its enclosure at the Memphis Zoo.

CBS affiliate WREG reports the primate, a macaque named Zimm, broke free around 4 p.m. Thursday.

After the escape, visitors were asked to leave the nearby area as workers searched for Zimm, who senior veterinarian Felicia Knight called a "very spirited monkey."

Zoo officials say Zimm, who weighs about 10 pounds and is described as harmless, likely ran into a storm drain on the property.

They say she could be asleep and may not come out until morning.

WREG reports that some areas of the zoo may be closed. Trams will not be running until the monkey is found.

The zoo tweeted:

Zimm has her own parody twitter account, which has more than 1,000 followers.