In another development in the JNU row, an unidentified person reportedly called the CPI(M) office in New Delhi between 10:30 PM - 1 AM on Sunday.
The caller reportedly abused the party and issued a threat to party leader Sitaram Yechury, asking him to leave the country.
The caller claims to be a member of the Aam Aadmi Balveer Sena. A formal complaint in connection to the threat call has been lodged at the Mandir Marg police station.
Prakash Karat on 15 February told the media that the threat call was an attempt to distract the party's resolve to stand by the JNU students.
This is response to party's firm stand against imposition of Hindutva ideology on campuses sponsored by Govt-P Karat pic.twitter.com/FxukG9RlBe- ANI (@ANI_news) February 15, 2016
Security has been beefed up outside the CPI(M) office. Jatin Narwal, DCP, New Delhi said: "We have just received written complaint, now we will take legal action."
The CPI(M) has strongly opposed the arrest of JNUSU President Kanhaiya Kumar in the aftermath of ruckus over an event organised in the memory of 26/11 convinct Afzal Guru, who was hanged last year on 9 February.