China fired its most direct warning shot yet amid reports that House Speaker Nancy Pelosi may visit Taiwan on Friday, saying that if the speaker's plane is accompanied by U.S.

fighter jets, they would not rule out shooting them down.

'If US fighter jets mersin escort Pelosi's plane into Taiwan, it is invasion. The PLA has the right to forcibly dispel Pelosi's plane and the US fighter jets, including firing warning shots and making tactical movement of obstruction. If ineffective, then shoot them down,' Hu Xijin, a commentator with the Chinese state-affiliated Global Times, wrote on Twitter.  

Earlier China warned the U.S.

against crossing a 'red line' as it released not-so-subtle warnings against the speaker, which China has reasoned is number three in line in U.S. government, from visiting Taiwan. 

The U.S. must be prepared to 'bear all consequences' if Pelosi chooses to visit Taiwan, Chinese foreign minister Zhao Lijian said in a briefing Friday. 

National Security Spokesman John Kirby said Friday the Pentagon has seen no indication of a military threat. 

'We just don't have any concrete indications of something happening from a military perspective on the Chinese part,' Kirby said. 

'There's no reason for it to come to come to blows, to come to increased physical tension. There's no reason for that because there's been no change in American policy,' he added.  

The speaker has not confirmed whether she will visit the island democracy during an Asian tour that includes stops in Japan, South Korea, Malaysia and Singapore.

In response to a question about the potential Taiwan trip on Friday, Pelosi only said:'I don't talk about my travel because it's a security issue.' 

Speaker Pelosi has not confirmed whether she will visit the island democracy during an Asian tour that includes stops in Japan, South Korea, Malaysia and Singapore