Peter and Paul walk into Pick 'n Pay wearing balaclavas and holding guns. They point the guns at two cashiers and demand that they open the tills and give them all the money in the tills. However, as the cashiers are about to take out the money, Peter and Paul notice two police officers in one of the aisles. They decide to run away.

Can Peter and Paul be charged and convicted of a crime? Give reasons for answer.