LISBON, Portugal (AP) — Portugal's prime minister lost his patience with journalists' questions Wednesday as accusations flew about who or which agency might be to blame for the deaths of 64 people in a raging forest fire. The Civil Protection Agency, which operates the firefighting service, said in a report that flaws in the radio system prevented the smooth flow of information between the command post and firefighters in the field. In an open letter on social media Wednesday, 12 academic experts urged the European Commission to support more research into fires in forests and buildings, including their causes and consequences.