Former President Shimon Peres has expressed his condolences over the passing of former US First Lady Nancy Reagan.

"Today I bow my head together, with the citizens of the US, at the loss of First Lady Nancy Reagan," he said.

"I recall her noble nature and fierce fight against drugs and alcohol amongst youth. During her time as First Lady, Reagan would illuminate the White House with a big smile and open heart," Peres added. "I extend my most sincere condolences to the whole Reagan family, her friends and all citizens of the United States."