HAVANA, Oct. 3 (Xinhua) -- Cuban Foreign Minister Bruno Rodriguez on Tuesday rejected the "unjustified" request from U.S. government asking for 15 Cuban diplomats to be expelled from America.

In a press conference at the ministry, Rodriguez said the U.S. demand was "based" on the fact that "Washington reduced its staff in Havana and that the island's authorities didn't take necessary steps to prevent attacks against U.S. diplomats."

"The Ministry of Foreign Affairs protests with energy and denounces this decision without base and unacceptable, as well as the pretext used to justify it when affirming that the Cuban government didn't take all the needed measures to prevent the 'alleged' incidents," said the minister.

Ten days ago, Cuba denounced the attempts to politicize the assumed events in which U.S. officials and their families on the island resulted harmed by "unknown acoustic attacks."

Cuba asked for the U.S. cooperation and demanded Washington not to take "rushed decisions without any evidence."

Last Friday the U.S. State Department announced the decision to pull 60 percent of its staff out of the embassy in Cuba in the wake of "sonic attacks" that have injured 21 people in its embassy in Havana.

But despite an intensive investigation by the Federal Bureau of Investigation and the local investigation agencies, the cause and perpetrators of the attacks remain a mystery.

Havana said to have nothing to do with the "attacks" while Washington accused the Cuban government of not protecting well enough its diplomats deployed in Havana.

Cuba and the United States resumed diplomatic ties in 2015 after 54 years of political enmity, but even before taking office President Donald Trump promised to reverse what he called a "terrible and misguided deal" with Havana.