Lebanon is in mourning after a huge explosion in the capital Beirut killed at least 100 people and injured more than 4,000 others on Tuesday. The whole city was shaken by the blast, which began with a fire at the port which exploded into a mushroom cloud. President Michel Aoun said 2,750 tonnes of ammonium nitrate had been stored unsafely in a warehouse for six years. He scheduled an urgent cabinet meeting for today, and said a two-week state of emergency should be declared. Meanwhile, the country will observe an official period of mourning for three days from today.