Two women were arraigned Wednesday for allegedly running a prostitution operation out of a spa in Maynard, according to authorities and legal filings.

Meiying Cheng, 57, of Flushing, N.Y., and Jianping Wu, 68, of Malden, both pleaded not guilty in Concord District Court to charges of deriving support from prostitution, inducing prostitution on premises, keeping a house of prostitution, and engaging in sexual conduct for a fee.

Wu’s lawyer declined to comment; it wasn’t clear who’s representing Cheng.

Cheng and Wu were ordered held on $5,000 and $10,000 bail, respectively, according to legal filings.

On Tuesday, officers executed a search warrant at Asian Spa, located on the second floor of 107 Main St., police said.

The warrant was obtained after “a weekslong investigation” into pos

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