Two days after a rocket slammed into a soccer pitch in the Israel-controlled Golan Heights, killing 12 children, many questions remain about the attack on the Druze town of Majdal Shams.

Israel accused Hezbollah in Lebanon of deliberately targeting civilians, while Hezbollah quickly issued a rare denial of any responsibility for the attack.

After a deadly strike on civilians in the annexed Golan Heights, Israel has threatened retaliation against Lebanon's Hezbollah, accusing it of perpetrating the attack with an Iranian-made Falaq-1 rocket -- part of its wide-ranging arsenal.

Hezbollah has traded near-daily cross-border fire with Israel in support of Hamas since the Palestinian militant group's October 7 attack on southern Israel triggered war in the Gaza Strip.

The Middle East braced for a potential flare-up in violence after Israeli authorities said a rocket from Lebanon struck a soccer field in the Israeli-controlled Golan Heights, killing 12 children and teens in what the military called the deadliest attack on civilians since Oct. 7. It raised fears of a broader regional war between Israel and Hezbollah, which in a rare move denied it was responsible.

The White House National Security Council said it was speaking with Israeli and Lebanese counterparts and working on a diplomatic solution to "end all attacks once and for all" in the border area between Israel and Lebanon.

The Golan Heights, a rocky plateau where 12 youths were killed Saturday amid clashes between Hezbollah and Israeli forces, is a strategic territory partially captured by Israel from Syria.

Following the conquest of about two-thirds of the plateau during the 1967 Arab-Israeli war, Israel in 1981 annexed the area in a move not recognized by the international community, with the exception of the United States since 2019.

An Egyptian official said the deadly strike in the Israeli-controlled Golan Heights could give urgency to the negotiations to reach a cease-fire deal in Gaza, which would be reflected on the Israeli-Hezbollah front.

He said mediators will use such an attack to press for a cease-fire in Gaza to avoid an all-out war in the region.