Cape Town - The Independent Police Investigative Directorate (Ipid) has said the case involving the mistaken shooting deaths of Nando's and McDonald's employees in Cape Town in March cannot be delayed any longer.Ipid spokesperson Robbie Raburabu told News24 on Tuesday that the police officers involved have yet to give statements. He said they had asked early in the process to do this through legal representatives."In my view, the police should not have delayed the case. We're having problems with a certain unit of the police."They keep postponing and it’s been over three months now since the incident."It cannot be delayed. If they weren't doing their work [during the incident], how can they delay us in doing our work?"Two employees of the McDonald's Kuils River franchise were mistakenly shot and killed by police in March.That incident followed another police shooting a week before in Cape Town where a Nando's employee was mistakenly killed on her way home from work.'Others can't take the fall'Raburabu said the police officers claim giving statements would put their lives as risk as they work undercover.He however said that that does not exempt them from being held accountable."If the police wanted this [resolved] quicker they would have co-operated."They go out and protect the country, so they have to be accountable to the employer," he said."We not saying we blame them for what happened. We saying they did their work, but they must still be held accountable and not let others take the fall."The bottom line is it must be investigated. We just want to know who is delaying it."Western Cape police declined to comment on Ipid's claim.