JERUSALEM, April 2 (Reuters) - Israeli Prime Minister Benjamin Netanyahu begins a four-day visit to Hungary on Thursday, defying an International Criminal Court arrest warrant over allegations of war crimes in Gaza as Israel has expanded its military operation in the enclave.

As a founding member of the ICC, Hungary is theoretically obliged to arrest and hand over anyone subject to a warrant from the court but Hungarian Prime Minister Viktor Orban made clear when he issued the invitation that Hungary would not respect the ruling.