NEW DELHI Police in southern India have arrested a senior leader of a right-wing Hindu group in connection with attacks on Christian churches and prayer halls last weekend, an official said on Saturday.

Mahendra Kumar, a state convener of the radical Bajrang Dal group in Karnataka state, was arrested late Friday night, according to a local police official.

`He`s part of the investigation of the attacks on Christian places of worship,` Prasad said.

Right-wing Hindu mobs mainly linked with Bajrang Dal attacked at least 20 churches and prayer halls in the Mangalore, Chikmaglur and Udupi districts of Karnataka state on September 14, alleging that some churches had circulated literature defaming the Hindu religion, Prasad said.

The attackers stoned the buildings, broke windows and furniture and in one place set fire to a car belonging to a pastor, the official said. At least 34 people, including five police, were injured in the violence, he said.

Police also have arrested 77 other people, most of them members of Bajrang Dal, in connection with the attacks, he said.

The violence in Karnataka followed weeks of Hindu-Christian violence in the eastern state of Orissa.

Orissa has been plagued by religious tensions between Christian missionaries, who work with mostly poor tribes in the region, and hard-line Hindu groups who claim the Christians are forcing or bribing people to convert.

Churches deny anyone has been pressured or paid to change their religious beliefs.

Christians account for about 2.5 per cent of India`s 1.1 billion population.

The death toll from more than three weeks of violence has risen to 25.