JODHPUR: Family of the brother of a BJP mandal president here was attacked by some unidentified assailants early on Tuesday morning. His brother’s wife was killed in the attack , while his brother and his son sustained serious injuries.Both were rushed to the hospital where all the candidates from both BJP and Congress, including their party leaders as well as workers, assembled in large numbers and began a demonstration demanding immediate arrest of the killers.Police commissioner and other senior police officers rushed to the hospital and assured them of arresting the accused as soon as possible. After the police’s assurance, the demonstration was stopped. According to the police, family of the brother of a mandal president of BJP Jethu Singh, lived in Banar’s Nandari locality in Jodhpur “On Tuesday, at around 4.00 am, some persons knocked at the door of his brother Gajendra Singh ’s house. Singh’s wife, Saroj Kanwar (37) opened the door. Before she could ask them anything, they pushed her and attempted to get inside,” said a police officer. When she resisted their attempt, one of them slit her throat with a knife. She later succumbed to the injury. Her loud shrieks woke up Gajendra and his son Khushal Singh.Both of them reached to the door, but were attacked by the intruders and suffered injuries. Police said that there were around 4-5 assailants, who easily overpowered the father-son duo and decamped with the valuables in the house. On the information, police from Banar police station as well as the senior police officials rushed to the spot along with FSL team and a dog squad.“We have begun the investigation and have also been considering all the angles that whether it was just for loot or if there was any other purpose of the accused,” said the ADCP Sarita Singh. Police have also recovered a knife from the house and a country-made pistol at a little distance from the house, which purportedly belonged to the assailants.