"We have sought a report from the Nagaland government about the incident and how a mob entered a jail and pull out an inmate," a home ministry official said.
Officials of the ministry are also in touch with the state government officials on bringing back normalcy in Dimapur, where situation in considered to be tensed.
Meanwhile, Home Minister Rajnath Singh said that he had already discussed with senior officials about the incident and asked them to take necessary action.
"I have already discussed (it) with the officials concerned. All necessary steps have already been taken," he said.
The central government has also alerted neighbouring Assam and asked it to step up vigil so that no untoward incident takes place along its border with Nagaland, officials said.
The man, accused of raping a girl, was beaten to death on Thursday after being pulled out of a jail by the mob.
The accused was dragged naked to the main town and he died of the injuries of beatings by the public, a senior official said.