A resumption of fighting in the war between Israel and Hamas threatens the peace efforts of Arab states, German Foreign Minister Annalena Baerbock said on Wednesday ahead of her trip to Lebanon to discuss the conflict.

"The resumption of fighting ... jeopardises the positive efforts of the Arab states, which together want to pursue a peaceful path for Gaza, free from Hamas," Baerbock said in a statement, calling for great restraint from all sides.

Israeli airstrikes pounded Gaza on Tuesday, shattering nearly two months of relative calm since a ceasefire began and killing over 400 people, according to Palestinian health authorities.