By Sruthi Shankar and Shashank Nayar (Reuters) -European stocks ended lower on Wednesday as concerning headlines regarding the Russia-Ukraine conflict dampened sentiment, while modest Western sanctions on Russia and strong corporate earnings updates helped limit further losses. The pan-European STOXX 600 index slipped 0.3%, after it firmed 1% in early trading with banks, financial services firms and retailers leading declines. Ukraine declared a state of emergency on Wednesday and told its citizens in Russia to flee, while Moscow began evacuating its Kyiv embassy in the latest ominous signs fo…