BARVIKHA, RUSSIA - Venezuelan President Hugo Chavez, visiting Moscow to pursue weapons and energy deals, on Tuesday called for a strategic alliance with Russia to protect his country from the United States.

Chavez has repeatedly accused the United States of plotting an invasion to destabilize his government, despite U.S. denials.

The alliance would mean "we can guarantee Venezuela's sovereignty, which is now threatened by the United States," Chavez told reporters shortly after his arrival in Moscow.

Chavez is in Russia to broker deals involving weapons purchases, oil exploration and possibly the creation of a joint financial institution.

Welcoming Chavez at Meiendorf Castle, his residence outside Moscow, President Dmitry Medvedev said Russian-Venezuelan relations "are one of the key factors of security in the [South American] region."

It is the presidents' first meeting since Medvedev took office in May.

Venezuela's state-run oil company, Petroleos de Venezuela SA, signed separate deals with three Russian energy companies -- Gazprom, Lukoil and TNK-BP -- on the first day of Chavez's visit.

In addition, Russian media have reported that Chavez is expected to reach a number of agreements for buying Russian military hardware, with one paper reporting the deals could be worth up to $2 billion.

The Venezuelan president also met Prime Minister Vladimir Putin and was to meet Russian military and business leaders.