LUCKNOW, Nov. 13 -- The murder of Mohammad Sharif, an accused acquitted in the 2007 terror attack on the CRPF Group Centre in Rampur, has prompted the police to step up security surveillance on two other men acquitted in the case, following a purported social media threat by the Jharkhand-based Rahul Singh gang against others linked to the attack.

The two are living in Moradabad and Bareilly.

Moradabad SP City Kumar Ranvijay Singh said that surveillance had been intensified on Jung Bahadur Khan alias Baba, whose safety was being monitored. He added that neither Baba nor anyone on his behalf had approached the police seeking security.

A police official privy to the development said Baba, a resident of Milak Kamru village under Mudhapand...