Pakistan, Feb. 6 -- Iran is preparing mass executions after recent talks with the United States ended, lawyers have warned. They say arrests have surged nationwide. Many detainees face death penalty charges without fair legal process.

In recent weeks, security forces have raided protesters' homes across Iran. According to lawyers, thousands were detained for joining nationwide protests. Many arrests happened without warrants or proper court procedures.

Read more: Two IS-linked men put to death in Iran

Moreover, prosecutors have filed severe charges at early investigation stages. These include moharebeh, or waging war against God, which carries the death penalty. Lawyers say evidence is often missing or weak in these cases.

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