Egypt is on the verge of exploding, prominent Egyptian law scholar and diplomat Mohamed ElBaradei warned Thursday on Twitter as his home country remained gripped in a presidential crisis and power struggle.

“The national interest is above narrow interests. We need a mediation committee immediately to find a political and legal way out of the crisis. Egypt is on the verge of explosion,” the former International Atomic Energy Agency chief tweeted.

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Authorities delayed the announcement of the winner of Egypt’s presidential election, which was expected Thursday, and gave no date for a decision, hiking tension as allegations of fraud swirled and each candidate declared he was the victor.

Amid the atmosphere of political confusion, the Muslim Brotherhood claimed there was an organized campaign of allegations against it to mar the election and keep its candidate, Mohammed Morsi, out of the presidency. The accusation raises temperatures and the possibility of a backlash from the Brotherhood if its rival — former prime minister Ahmed Shafiq — is declared the winner.

Associated Press contributed to this report.