New Delhi, Aug 7 (IANS) Suspected Congress workers entered the compound of Janata Party chief Subramanian Swamy's house in south Delhi Sunday and ransacked his garden to protest a controversial article he wrote recently, police said.

The incident took place around 5.30 p.m., when the police received a call about protests at Swamy's house in East Nizamuddin.

Swamy, meanwhile, posted on microblogging site Twitter: "Rowdy Congress persons break open into my Nizamuddin compound (and) destruct my garden. Police have arrived. Please inform police (sic)."

In another tweet, Swamy said: "A plain clothes police officer was witness and has given evidence for FIR."

A police officer said that a few Congress workers shouted slogans and entered the garden. "They ransacked the garden and left in fifteen minutes."

Police have registered a complaint in the case.

"As preventive measure, we have deputed a team of around 15 policemen there," said the officer.

The reason behind the incident is yet unknown, but police said that the Congress workers were protesting a signed newspaper article by Swamy, where he suggested that the voting rights of Indian Muslims be revoked.