Officials in Venezuela have accused the US of sending a cache of high-powered rifles and ammunition on a commercial cargo flight from Miami so they would get into the hands of President Nicolás Maduro's opponents.

Members with the Venezuelan National Guard [GNB] and the National Integrated Service of Customs and Tax Administration [SENIAT] made the shocking discovery just two days after the plane arrived at Arturo Michelena International Airport in Valencia.

Inspectors found 19 rifles, 118 magazines and 90 wireless radios while investigating the flight which they said arrived Sunday afternoon.

Monday's bust also netted four rifle stands, three rifle scopes and six iPhones.

The Deputy Minister of Public Security, Endes Palencia, told reporters during a Tuesday afternoon press conference that the weapons were destined to reach the hands of 'extreme right fascist' groups looking to destabilize Maduro's government.

The Venezuelan leader has continuously accused President Donald Trump's administration of helping to organize a coup.

Venezuela's Deputy Minister of Public Security, Endes Palencia (first from left), reveals the shocking discovery of a cache of weapons that was delivered on by a commercial cargo plane from Miami on Sunday. Without offering any evidence, the government has blamed the United States government of organizing a coup

Venezuelan officials uncovered a hidden shipment at Arturo Michelena International Airport in Valencia which contained 19 rifles, 118 magazines and 90 wireless radios. President Nicolás Maduro's regime said the warlike artillery was destined to reach groups looking to topple the government

In his State of the Union address Tuesday night, Trump reiterated the United States' support for opposition leader Juan Guaidó.

'We stand with the Venezuelan people in their noble quest for freedom,' Trump said.

Palencia, without any proof, claimed the weapons were to be used by factions looking to carry out terror activities bankrolled by the 'extreme right fascist' groups and the government of the United States.

The Deputy Minister of Public Security stood behind a table flaked by two government officials while the seized weaponry was displayed during a press conference.

'Our revolutionary government, led by our commander Nicolás Maduro, is establishing all the security mechanisms to bring peace and tranquility to our people,' Palencia said.

The announcement came on the same day the Venezuelan military tried to seal off a bridge by block humanitarian aid from entering the country at a border crossing with Colombia.

According to Colombian officials, the GNB placed a fuel tanker, two cargo trailers and makeshift fencing near the border town of Cucuta in Colombia.

'It's a means of intimidation, but I don't think it will accomplish anything,' said Alba Pereira of nonprofit Entre Dos Tierras. 'It's convenient for them to let the country continue enduring this absurd crisis.'

Embattled Venezuelan leader Nicolás Maduro is still holding on to the presidency despite mounting pressure from the international community asking him to step down. Maduro has repeatedly accused the United States government of plotting to stage a coup

Opposition leader Juan Guaidó, who has been recognized as the country's interim president by more than 40 countries, including the United States and European Union, argues that almost 300,000 people could possible die if the troops supporting Maduro don't allow the aid to come through.

Venezuela has been ravished by a shortage of essential human needs such as food, water, medicine and medical supplies that has forced millions of families to abandon their homeland.

'You know there's a red line, you know well there's a limit, you know that medicines, food and medical supplies are that limit,' lawmaker Miguel Pizarro said in a message to the military.