The CPI - M on Sunday asked police to "thoroughly investigate" the attack on its main office here by some right - wingers, one of whom was caught.
The Communist Party of India - Marxist said that around 3. 30 p. m. "a few goons owing allegiance to right - wing forces" attacked its headquarters.
"Party comrades apprehended one of the attackers and handed him over to Delhi Police.
"Police must thoroughly investigate this incident and take action against the culprits and their mentors. "
The CPI - M said those who hero - worship the murderer of Mahatma Gandhi as a "national hero" have the temerity to accuse the CPI - M of being anti - national.
"We do not require certificates of patriotism from such elements.
"This is a politically motivated attack on the CPI - M headquarters. The CPI - M will meet this challenge politically and defend ourselves against such attacks. "