A journalist, who is a contributor for a popular Kerala-based website, and three other men were arrested in Uttar Pradesh's Mathura on Monday over alleged links to the Popular Front of India or PFI, an outfit the Yogi Adityanath government wants banned. The four men were headed from Delhi to Hathras, where a 20-year-old woman was allegedly gang raped and tortured last month, in a car when they were stopped and arrested, police said.