At least two people died Sunday during protests in Pakistan over an anti-Islam film .
Demonstrators marched to the U.S. consulate in Karachi, but were held back by police.
Officials say at least five others, including two police officers, were injured.
The movie is said to portray the Prophet Mohammad as a womaniser and a fool.
Sunday's protests were relatively small compared to previous bouts of unrest in the days before.
The United States has stepped up security at embassies and consulates worldwide in response to the outrage over the film.
Pakistan has condemned the film but has urged restraint.
