An American museum that wants to honor a Cuban scientist says it is frustrated the U.S. government denied the scientist a visa to come and pick up his award.

A spokesman for the Tech Museum of Innovation, in San Jose, California, said the museum had wanted the federal government to grant a visa to Vicente Verez Bencomo for the Wednesday ceremony.

US Denies Visa for Cuban Scientist to Attend Award Ceremony

The newspaper quoted the spokesman as saying Mr. Verez-Bencomo had been allowed entry as recently as March.

US Denies Visa for Cuban Scientist to Attend Award Ceremony

The U.S. State Department has declined to comment.

US Denies Visa for Cuban Scientist to Attend Award Ceremony

Mr. Verez-Bencomo was one of a number of scientists being honored for innovations that use technology to benefit mankind.

He helped develop a low-cost vaccine that fights the bacteria causing pneumonia and meningitis, diseases which kill some 700,000 children each year.