Dehradun, June 23 -- Chamoli police begun the investigation into the FIR registered against unidentified locals in connection with the Karnaprayag clash that led to four Hemkund Sahib pilgrims being booked and arrested. Chamoli superintendent of police Surjeet Singh Panwar said, "We have been taking action as per law and have now begun investigating the FIR registered against locals on the complaint of the father of one of the four Sikh pilgrims arrested in last week's clash." Meanwhile, on Sunday, a delegation of political leaders from Punjab met Uttarakhand director general of police Deepam Seth and sought appropriate action in the matter. Faridkot MP Sarabjeet Singh Khalsa said those arrested acted in self-defence and demanded that the FIR against them be withdrawn. "Had they not defended themselves, they would have been killed," he said. On June 16, a dispute over parking outside a hotel near the taxi stand in Karnaprayag escalated into violence when pilgrims returning from Hemkund Sahib allegedly attacked some locals with swords. Five people, including a pilgrim, sustained injuries in the incident. One of the injured was airlifted to a private hospital in Dehradun for treatment. The injured were identified as Prakash Rawat (26), Sudarshan Kandari (55), Gajpal Singh (50) and Harendra Singh (42), all residents of Karnaprayag, and Manpreet Singh (21), a resident of Mohali in Punjab. Following the incident, angry residents and hotel owners blocked the Rishikesh-Badrinath highway for nearly four hours. Police later arrested four pilgrims, including Manpreet Singh, in connection with the incident. Based on a complaint filed by Manpreet Singh's father, Som Raj, police on June 20 registered an FIR against unidentified people at Karnaprayag police station under sections 115(2) (voluntarily causing hurt), 117(4) (voluntarily causing grievous hurt), 190 (unlawful assembly), 191(2) (rioting), 196(1)(c) (promoting enmity on religious grounds), 324(4) (mischief causing damage), 351(2) and 351(3) (criminal intimidation) of the Bharatiya Nyaya Sanhita (BNS). Raj sought a fair and impartial probe into the incident. He claimed that his son, Manpreet Singh, and three friends were returning from Hemkund Sahib when a dispute over parking escalated in Karnaprayag. According to the complaint, locals made objectionable remarks about their religion and attire before assaulting them with iron rods and wooden sticks, causing serious injuries, including a fracture to Manpreet Singh....