Mugabe urges end to violence as Zimbabwe turns 30

* Mugabe wants end to political violence

* Zimbabwe economy in deep crisis

* Three decades since veteran leader took power

By Cris Chinaka

HARARE, April 18 (Reuters) - President Robert Mugabe on Sunday urged Zimbabweans to end political violence and focus on rebuilding a devastated economy that critics say is a victim of his three decades in power.

Addressing a rally to mark 30 years of independence from Britain, Mugabe said Zimbabwe would pursue its controversial land seizure policy and plans to transfer control of foreign firms to locals as part of a black empowerment drive.

In a fairly mild speech by his strident standards, Mugabe, now 86, denounced Britain, the United States and other Western countries for imposing sanctions on Zimbabwean leaders over charges of vote rigging and rights abuses.

But there was none of the usual name-calling in what has become a traditional attack on what he sees as imperialist forces.