Austrian police detained four Indian men suspected of planning an attack at a talk by an Indian religious leader, media reported Thursday, dpa reported.
An Interior Ministry spokeswoman did not rule out that the arrests in the town of Oberwaltersdorf on Wednesday were connected to the assassination of an Indian sect leader in Vienna last year.
The suspects were detained as they arrived at the venue of a talk by Baba Gurinder Singh, the leader of the Radha Soami Satsang Beas religious centre, which is headquartered in the northern Indian state of Punjab.
Of the arrested men, one had travelled to Austria from Spain, one is a militant Sikh with a criminal record living in Germany, while two live as asylum seekers in Austria, according to the daily Kronen Zeitung.
No weapons were found on the four.
The events in Oberwaltersdorf, south of Vienna, unfolded as six allegedly radical Sikh men are currently on trial in Vienna. They are charged with having carried out the fatal Vienna attack on a more liberal religious group called Dera Sach Khand in May 2009.
Sixteen people, including the head of the sect, were injured, while the deputy head was shot to death. The attack led to violent unrest in Punjab, with three persons killed.