 How many weapons did Iran give to Hamas? Leyan. 93% of the weapons and military equipment of Hamas is provided by Iran. This was said by the Chairman of the European Commission Ursula von der Leyen. He said that for this reason, heavier sanctions should be applied against the government of Tehran. The danger of the war between Hamas and Israel spreading to the region is real. I call for the continuation of the dialogue between Israel and its neighbors. He added. Hamas requires its weapons through smuggling or local construction and receives some military support from Iran. The CIA's World Factbook says, Experts say the Islamic Republic has long been Hamas's main military supporter, smuggling weapons into the enclave through clandestine, cross-border tunnels or boats that have escaped the Mediterranean blockade. Hamas's tunnel infrastructure is still massive despite Israel and Egypt regularly degrading it. Bilal Saab, Senior Fellow and Director of the Defense and Security Programme at the Middle East Institute in Washington, Hamas has received arms from Iran smuggled into the Gaza Strip via tunnels. This often included longer-range systems, said Daniel Byman, a senior fellow with the Transitional Threats Project at the Center for Strategic and International Studies.