Hong Kong (CNN) Taiwan has strongly protested the deportation of five of its nationals from Kenya to mainland China, the second such incident in recent months .

Alleged fraudsters

The deportees are accused by Chinese authorities of being involved in dozens of fraud cases worth upwards of $600,000. They were arrested by Kenyan police in November 2014, Xinhua said.

They are part of the same group deported from Kenya to mainland China in April, who were also accused of fraud. That group included 45 Taiwanese citizens, sparking a diplomatic incident between Taipei and Beijing

Many of the suspects deported to China had previously been acquitted by a court in Nairobi of running a complex phone and internet scamming operation, but then later charged by Chinese authorities. Chinese officials said the Taiwanese nationals confessed after being flown to China

At the time, China's Ministry of Foreign Affairs spokesman, Lu Kang, said "the one China policy is an important precondition for bilateral relations with China and other countries. We commend Kenya for implementing this policy."

The "one China" policy is the principle that Taiwan and China are part of the same country. The governments of Taiwan and China both claim sovereignty over mainland China and Taiwan -- but crucially, neither recognizes the other's legitimacy.

Kenya does not recognize Taiwan -- officially the Republic of China (ROC) -- nor does it maintain diplomatic relations with the island. Only a handful of states, mainly small island nations and South American countries, recognize the ROC

According to Xinhua, Chinese police "kept their Taiwan counterparts informed of all developments" with regard to the latest deportations.