After allegations of snooping, the Mumbai police on Thursday increased the security cover of NCB Zonal Director Sameer Wankhede, who is currently supervising investigation into the high-profile drugs-on-cruise case, an official said.

Wankhede, who earlier this week claimed that two policemen were monitoring his movements, confirmed the development. According to the official, the police have provided a gunman and three more personnel to guard the senior IRS officer. The vehicle, which he was using earlier, has been replaced with an SUV as part of his new security detail, he said. The number of police personnel deployed outside the Narcotics Control Bureau (NCB) office at Ballard Estate in South Mumbai has also been increased, the official said.