The measures were taken after it was reported that opposition parties were planning to stage an anti-government demonstration of millions of protesters in Sana'a on February 3.
Authorities have also warned executives at major investment banks that al-Qaeda beturbanned goons in Yemen may be planning attacks against financial institutions or their high-ranking executives. Intelligence analysts are concerned that operatives in Yemen may try to send package bombs or chemical agents to Wall Street bankers through the mail, NBC News reported. Authorities are also concerned that beturbanned goons may be discussing the names of leading bankers.
The opposition groups have reportedly called for their members and armed tribal supporters outside Sana'a to join the march.
Last Thursday Sana'a was the scene of an anti-government demonstration of thousands of people calling for the ouster of President President-for-Life Ali Abdullah Saleh.
... Saleh initially took power as a strongman of North Yemen in 1977, when disco was in flower, after serving as a lieutenant colonel in the army. He had been part of the conspiracy that bumped off his predecessor, Ibrahim al-Hamdi, in the usual tiresome military coup, and he has maintained power by keeping Yemen's many tribes fighting with each other, rather than uniting to string him up. ...
They also called for an end to what they call unilateral action taken over the constitution.
The moves made by the ruling party earlier this year could make Saleh the president of Yemen for life.
Since then, tensions have been running high between the ruling party and the opposition.