By Asif Shahzad and Gibran Naiyyar Peshimam ISLAMABAD (Reuters) -Pakistan launched strikes on separatist militants inside Iran on Thursday, in a retaliatory attack two days after Tehran said it struck the bases of another group within Pakistani territory. Iranian media said several missiles hit a village in the Sistan-Baluchestan province that borders Pakistan, killing at least nine people, including four children. The tit-for-tat strikes are the highest-profile cross-border intrusions in recent years and have raised alarm over wider instability in the Middle East since the war between Israel …