By Ahmet Gurhan Kartal
LONDON (AA) - British Foreign Secretary Boris Johnson has summoned Russian and Iranian ambassadors over the situation in Aleppo.
"I have just summoned the ambassadors of #Russia & #Iran to convey profound disquiet over #Aleppo. Crucial to protect civilians & deliver aid," Johnson tweeted.
Syria has been locked in a vicious civil war since early 2011, when the Bashar al-Assad regime cracked down on pro-democracy protests -- which erupted as part of the "Arab Spring" uprisings -- with unexpected ferocity.
Since then, more than a quarter of a million people have been killed and more than 10 million displaced across the war-battered country, according to the UN.
The Syrian Center for Policy Research, however, put the death toll from the six-year conflict at more than 470,000 people.