The Yemeni Interior Ministry has reinforced its security forces around the capital Sana'a and blocked byways to prevent the smuggling of weapons into major cities, Press TV reported.
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 terrorists 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 terrorists 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 Ali Abdullah Saleh.
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.