G7 says it won’t recognise Crimea referendum

G7 has warned that it won’t recognise a referendum in Crimea on joining Russia.
In a statement, it’s said it would have “no legal effect” because it would violate Ukraine’s constitution.
It's also called on Russia today to immediately halt its actions in supporting the referendum, saying that, if it moves to annex Crimea, it'll take "further action, individually and collectively".
The annexation of Crimea, said leaders, "could have grave implications for the legal order that protects the unity and sovereignty of all states."