THANE, Jan. 14 -- Five people have been arrested in connection with a violent clash that erupted between BJP and Shiv Sena workers in Dombivli East late Monday, police officers said. At least one person was seriously injured, and three others sustained minor injuries in the clash, which occurred in the Tukaram Nagar area while the parties were campaigning for the civic elections on January 15. Although the Shiv Sena and BJP are in an alliance for the Kalyan-Dombivli Municipal Corporation elections, both parties are contesting against each other in panel No. 29, which comprises four wards, due to a lack of consensus over ticket distribution. Shiv Sena candidates Nitin Patil and his brother Ravindra Patil are in the fray in the panel, along with Aarya Natekar from the BJP. According to the police, on Monday evening, Natekar's husband, Omnath Natekar, and some BJP workers were visiting a residential building in Tukaram Nagar for campaigning when they were confronted by Nitin Patil and his supporters. The Shiv Sena candidate accused some BJP workers of distributing money in the area and stopped them from entering the premises. This escalated into a heated argument and later turned violent, during which Patil and his supporters allegedly attacked Natekar with a sharp weapon, causing him serious injuries. Natekar was rushed to the AIMS Hospital in Dombivli, where he is currently undergoing treatment, officials said. Three BJP workers also sustained minor injuries. On Tuesday, the BJP organised a protest march in the area, demanding arrest and action against the Shiv Sena candidates and their workers. Aarya Natekar said, "The opposition candidates wanted to kill my husband, and I demand the strictest punishment against them. As far as the allegations of distributing money are concerned, they are completely false, and fabricated videos are being circulated to defame us." Kalyan-Dombivli BJP president Nandu Parab alleged that Nitin and Ravindra Patil attacked Omnath Natekar with a sharp knife on his head. "They want to create fear among their opponents and force them to withdraw from the elections," he said. Nitin Patil denied the allegations, claiming that he informed the police about the incident. He questioned the presence of BJP workers in the area at 11 pm, raising doubts about their campaigning activities at such a late hour....