Syria’s army attacked Lebanon after it said three soldiers were kidnapped, brought to Lebanon and killed by Hezbollah militants. Hezbollah denied involvement.

Syrian troops exchanged fire with Lebanese soldiers and armed groups in northeast Lebanon overnight and into Monday in a new round of clashes along the two countries' border. Tensions along the mountainous frontier have been high in the months since Islamist rebels toppled Syria's Bashar al-Assad,

Syria’s military fired rockets and shells at Lebanon on Sunday after accusing Iran-backed Hezbollah of executing three Syrian army personnel, sparking unusual tensions between the two war-ravaged neighbors.

Syria is facing dire humanitarian problems and an uncertain political transition after the fall of Bashar al-Assad.

Germany is pledging a further 300 million euros ($326 million) in aid for Syrians through the United Nations and select organisations, said Foreign Minister Annalena Baerbock on Monday, ahead of an EU-led donor conference in Brussels.