NAIROBI, Kenya -- Authorities in Tanzania charged hundreds of people with treason over demonstrations around disputed polls last month, in a major escalation of political tension as the country reels from violence in which an unknown number of people were killed.

In addition to dozens criminally charged a day earlier in Dar es Salaam, dozens more face similar treason charges elsewhere in the East African nation, according to numerous charge sheets that became publicly available Saturday.

Wanted suspects include Josephat Gwajima, an influential preacher who had his church deregistered earlier this year after he criticized the government over rights abuses.

Police also issued arrest warrants for some of the top opposition officials who hadn't yet been jailed. They include Brenda Rupia, co

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