New Delhi, Nov. 7 -- Tanzania is reeling from violence following the Oct. 29 election that international observers say fell short of a free and fair vote. As authorities face questions over the death toll after security forces tried to quell riots and opposition protests in the East African country, the leading opposition party Chadema asserts that hundreds were killed in the violence.

The African Union said Wednesday in a statement that its observers had concluded the election "did not comply with AU principles, normative frameworks, and other international obligations and standards for democratic elections."

AU observers reported ballot stuffing at several polling stations and cases where voters were issued multiple ballots. The envir...