A knife-wielding man who was shot and killed by officers outside a police station in Derby had been tackled with a stun grenade, baton round and stun gun before the fatal shot was fired, the police watchdog has said. Marius Ciolac, 35, died in hospital on Friday morning after being shot by armed police outside Ascot Drive police station. Officers at the station reported a man with a knife in the car park, who was smashing glass in the entrance door and nearby windows. The Independent Office for Police Conduct (IOPC), which is investigating the incident, said officers used a multibang stun grenade, discharged a baton round and used a stun gun on Ciolac, before he was shot just after 10am. Ciolac was given first aid by officers and paramedics at the scene and taken to hospital in Nottingham, but died later that morning. Three knives of various sizes were recovered from the scene and one shot was fired from a police-issue firearm, the IOPC confirmed. The provisional findings of a postmortem said Ciolac died from a single gunshot wound to the abdomen. Ciolac was a Romanian national with no family in the UK, and although he has been named, formal identification has yet to take place, the IOPC said. Derrick Campbell, a regional director, said the watchdog had contacted Ciolac’s family in Romania and Italy. “A lot of rumour about the tragic events of Friday morning has been reported and while it is natural for people to want answers quickly about what happened, I would ask that people show patience and refrain from further speculation out of respect for Mr Ciolac’s family and for everyone involved,” he said. Investigators have already gathered CCTV footage, police body-worn video and accounts from officers and emergency services at the scene, he added. “We are also in the process of contacting members of the public identified as potential witnesses who may be able to assist our inquiries.” The police base on Ascot Drive opened in April, in a new building next door to Derbyshire fire and rescue service.