Tihar Jail authorities have been asked to minutely screen the area and maintain maximum security around Jail no 2 of Tihar prison where underworld don Chhota Rajan was lodged on Thursday.
According to PTI, a team of 10 head warders, 10 warders, one deputy superintendent and two assistant superintendents have been drawn for the purpose from different jails.
"The DG has also briefed the staff and warned that no breach of security will be tolerated," a senior prison official reportedly told PTI.
Rajan was brought to the high-security Tihar jail after being sent to 14 days judicial custody by court as CBI decided to take over all the 71 cases registered by Maharashtra Police against him.
"Rajan has furnished the names of his wife and a friend in Mumbai in his visitors' list," the official said.
The ITBP and CRPF, which take care of the security outside the prison, have increased their surveillance to ensure that nothing is smuggled to him on the premises.
Deported after being on the run for 27 years, the 55-year-old gangster, whose real name is Rajendra Sadashiv Nikalje, was remanded to CBI custody in connection with his passport procured on a fake identity.
Rajan, once a close aide of Dawood Ibrahim, has been brought to the country to face trial in over 70 cases of murder, extortion and drug smuggling in Delhi and Mumbai.
After his arrest in Bali on October 25, India had pressed for his early deportation.
(With inputs from PTI)