Hamas admits that its fighters are trained in Iran

Iran Press News -- A senior commander interviewed by The Sunday Times said 300 of the group’s “best brains” had been secretly sent to Tehran.
Half are still being trained by Revolutionary Guards. They are learning how to make explosives from everyday items and produce deadlier rockets.
The rest have already returned from a Revolutionary Guard base in Tehran. Some have been trained as snipers. Others have learnt to use tunnels in attacks on Israeli forces.
“Iran is our mother,” the commander said. “She gives us information, military supplies and financial support.”
Seven separate groups of Hamas militants have spent up to six months in Tehran since the training began in 2005.