Russia has revealed it warned the US about 'red lines' it should not cross before it launched airstrikes on Syria. Foreign minister Sergei Lavrov is reported to have said that officials in Washington were contacted before last weekend's strikes by the US, UK and France. Mr Lavrov said: "There were military leadership contacts, between generals, between our representatives and the coalition leadership. 'They were informed about where our red lines are, including red lines on the ground, geographically. And the results show that they did not cross these red lines.'