BEIJING—China’s newly-established Asian Infrastructure Investment Bank and its Silk Road Fund could be used to help finance its vast infrastructure spending plans in neighboring Pakistan, a senior Chinese official said Friday.

China would announce how much it plans to invest in the Pakistani program during Chinese President Xi Jinping’s visit to Pakistan, which starts Monday, Assistant Foreign Minister Liu Jianchao told a news briefing.

He declined to confirm Pakistani officials’ estimates of $46 billion for the program, known as the China-Pakistan Economic Corridor, but said “a huge amount of financing” is needed for its core infrastructure projects.

“China stands ready to provide financial support to Pakistan to be used on these projects,” he said. “As for the specific figure, China will make the announcement during President Xi’s visit.”

He said a number of intergovernmental agreements and commercial deals relating to the Pakistani program would be signed during the visit.