text: Investigators are trying to determine why a man shot his wife and two young sons before killing himself at the family's home in a quiet Oklahoma suburb this week. Sudheer Khamitkar, 42, shot his 38-year-old wife, Smita Haval Khamitkar, and their sons Arnav Khamitkar, 10 and Arush Khamitkar, 6, in separate rooms at their Tulsa home, police said. The bodies were found on Wednesday as officers conducted a welfare check requested by the mother's employer after she failed to show up for work or call in sick for two days. 'Right now we still don't know the motive behind the murder-suicide,' said Sergeant Shane Tuell. Gunned down: Smita Haval Khamitkar, pictured with one of her sons, was shot by her husband along with their two boys - aged six and 10 - before he turned the gun on himself. Their bodies were found on Wednesday . On Thursday, Tuell said the father had recently changed jobs and that detectives would interview his current and former employers in an effort to learn if he was having personal troubles. There was no indication of forced entry and no suspects are being sought, authorities said. A backdoor was unlocked and a handgun was found near the father's body. 'The evidence indicates that the father shot and killed the children and the wife before turning the gun on himself,' said homicide Sergeant Dave Walker in a news release. 'There is evidence of multiple gunshots throughout the house. All the bodies were found in different rooms throughout the house.' Sergeant Walker added that the family had lived at the home for 10 years and there had been no previous history of domestic violence or criminal activity at the home, Newson6 reported. Questions: Tulsa police gather at the front entrance of a home as they investigate after a father shot dead his wife, their children and himself in Tulsa, Oklahoma on Wednesday. They are still searching for a motive . Tulsa police captain Matt McCord said the bodies may have been in the house for 'as many as two days' Mrs Khamitkar, whose Facebook page indicates she was originally from Pune in India, had worked as an Android app developer for American Airlines. 'Smita Khamitkar was a member of the American Airlines team in Tulsa for nearly five years and we're deeply saddened by the news of her passing,' the company said in a statement. 'Our thoughts and prayers are with Smita's family, friends and colleagues during this very difficult time.' Online profiles for Mr Khamitkar show he had trained and worked as a mechanical engineer for companies including Oseco, a relief systems company, and Wellman Products Group, a company that develops car parts. He had also secured multiple patents in previous years for new types of rupture discs - a device that prevents equipment or a system from being damaged by too much pressure. Neighbors said they were shocked by the events and called the area safe. Most every property in the neighborhood has a large fence, so children can play or swim in privacy, though some play basketball in the driveway or at a cul-de-sac. 'I love this neighborhood. It's very quiet here,' Mercedes Perez told The Associated Press. Police investigate the scene after the bodies of four people were found following a welfare check . Her husband, Vinicio Perez, said he would sometimes see two children playing and bouncing around in the front yard of the home where the bodies were found. 'I'm shocked,' he said. 'This place should be a place surrounded by security.' Stephen Wiseman lived next door to the family for almost ten years. He said: They were wonderful, the most kind [and] gentle people you'd ever meet. Our kids played with them all day on Saturday, and … we saw the kids on Sunday.' Another neighbor reported hearing noises at the house late on Monday.
target: Sudheer Khamitkar, shot his wife, Smita Haval Khamitkar, and their sons Arnav Khamitkar, 10 and Arush Khamitkar, six, earlier this week .
  Their bodies were found after Mrs Khamitkar's employers, American Airlines, requested a welfare check when she failed to turn up to work .
  Police say they still do not have any motive but are speaking to Mr Khamitkar's employers; he recently switched jobs, they said .