Shi'ites have been attacked during a religious procession in Pakistan and at mosques in two cities in Iraq. (Thanks to Jeffrey Imm for the links.)
Sunni vs. Shi'ite warfare is nothing new, but non-Muslim powers should never imagine that they can exploit these divisions for their own purposes. The ethos of "my brother against my brother, but both of us against our cousin" prevails.
And in Afghanistan:
One Shi'ite Killed, 16 Wounded in Kabul Clash
http://abcnews.go.com/wire/World/reuters20040302_218.html