New Delhi: Delhi Police arrested Rashtravadi Sena chief Jai Bhagwan Goyal on Tuesday in connection with the Monday's attack on Maharashtra Sadan.
"We have arrested Goyal who had claimed responsibility for the attack on Maharashtra Sadan," a senior police official was quoted as saying by PTI.
Goyal has been lodged at the Tilak Marg police station.
With the arrest of Goyal, the total number of arrests in the case has risen to four. Three persons -- Suresh Sharma, Amardeep and Raja -- were arrested on Monday.
Earlier, Shiv Sena activists set ablaze the head office of the Rashtrawadi Sena in Shahadra in Delhi.
According to the Shiv Sena North India chief Sandip Kulkarni the office was set ablaze in retaliation to Monday's attack on the Maharashtra Sadan in New Delhi.
The fire was reported from the office in Shahdara in north-east Delhi at around 0910 hrs IST and five fire tenders were rushed to the spot to douse the fire.
"It was a spontaneous reaction by Sainiks angered by the insult of the Sena leaders by Rashtravadi Shiv Sena. It was a befitting reply to those who attacked the Maharashtra Sadan," Kulkarni said.
He also accused Goyal of trying to "unnecessarily" blame the Shiv Sena in the Marathi-North Indian row.
Rashtravadi Sena, which was formed to counter Shiv Sena's anti-north Indian stand, had attacked Maharashtra Sadan on Monday and demanded arrest of Maharashtra Navnirman Sena chief Raj Thackeray under the National Security Act.