Intelligence agencies have warned of plans by Pakistan-based terrorists to target BJP president Rajnath Singh after which the Centre has asked Uttar Pradesh Government to beef up his security.

According to intelligence inputs, two Pakistani and two Lashkar-e-Toiba militants had reportedly left Jammu on January 5 to carry out attacks on Singh and senior BJP leader Vinay Katiyar.

The Home Ministry has written to Uttar Pradesh Government asking it to "review and appropriately strengthen" the security arrangements of both of them to avert any untoward incident from happening, sources said.

Singh, a former Union Minister and Chief Minister of Uttar Pradesh, has Z+ security with the National Security Guard cover while Katiyar has Z+ security in the state.

The intelligence inputs suggested that terrorists may carry out attacks on Singh and Katiyar in Uttar Pradesh or in Delhi at an "opportune time", a letter sent by the Home Ministry to the Uttar Pradesh government said.

Senior BJP leader L K Advani and Gujarat Chief Minister Narendra Modi are already on the terror hitlist and have been provided with tight security and NSG cover in view of the threat perception.