DUBAI - Bahrain vowed on Tuesday to crack down harder on anti-government protests as a leading opposition figure said the government had put a stop to talks on addressing the political grievances that fueled last year's pro-democracy uprising.

Bahraini media have reported a new security plan to "restore order" to the Sunni-ruled Gulf monarchy and, in recent days, authorities have detained a leading activist and warned a top Shi'ite cleric to stop alleged incitement to violence.

The moves coincide with a Saudi push for a Gulf union, likely to be discussed at a May 14 summit of Gulf leaders in Riyadh.

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