The Libya war and revolutions in Egypt and Tunisia should be a warning to authoritarian leaders in the West Asia and North Africa still ordering forces to shoot demonstrators, UN chief Ban Ki-moon said.
Ban, who has castigated the king of Bahrain and strongly condemned the repression of demonstrations in Yemen and Syria in recent days, said as he began a trip to Egypt and Tunisia today that other nations have a duty to speak out.
"It is clear that a wind of change is sweeping this region," he said in an interview.
"The international community, while we closely follow the situation, has a responsibility to help those people, so that leaders could hear clearly and sincerely the voices of the people, their aspirations."
The UN secretary general said leaders in Bahrain, Yemen and Syria must have seen the uprisings in Tunisia, Egypt and now Libya where Moamer Kadhafi's brutal crackdown led to UN-sanctioned military strikes.
"We are living in an era of globalisation and communications, so they must have been following and they must have been listening to what the international community expects them to do," Ban said.
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"I have been talking to all the leaders in the region, all the leaders without exception, every day, urging them to take bold reform measures that respect the will of their people and ensure freedom of speech."
In Syria, security forces have shot and killed several demonstrators in the southern town of Deraa. Ban last week called for "genuine reforms, not repression."
In the Yemeni capital Sanaa, more than 50 demonstrators have been killed.
The UN chief condemned the government and yesterday said he doubted that President Ali Abdullah Saleh's decision to sack the government would calm the population.
Ban spoke with the Bahrain's monarch, King Hamad, last week to highlight his "deepest concern over reports of excessive and indiscriminate use of force by security forces and police in Bahrain."
He warned that their actions could breach international humanitarian law.
The Arab League was instrumental in getting the UN Security Council to pass Resolution 1973 last week which approved military action against Kadhafi.
Ban has called the resolution "historic" because it "affirms unequivocally, the international community's determination to fulfill its responsibility to protect civilians from violence perpetrated upon them by their own government."