WASHINGTON: President Barack Obama on Friday called for the unconditional and immediate release of an Israeli soldier who was apparently captured in a clash with Hamas.

He said it would be difficult to put back together the ceasefire between Hamas and Israel that collapsed earlier today. However, the president added the US will continue working toward a ceasefire.

Obama said Israel was committed to the ceasefire, but the ceasefire was violated. He said it was heartbreaking to see what's happening in Gaza.

Related: Gaza truce collapses after ‘capture’ of Israeli soldier

The US president said he wants to see everything possible done to ensure Palestinian civilians are not killed.

He said Israel must be able to defend itself, but that irresponsible actions by Hamas have put civilians in danger.

The truce was brokered by the US and United Nations but collapsed less than two hours after it began.