WASHINGTON, April 23 (Reuters) – The average rate on the popular U.S. 30-year ‌fixed-rate mortgage fell this week, though ‌further declines are likely to be limited by ​uncertainty surrounding a fragile ceasefire between Washington and Iran.

The 30-year fixed mortgage rate averaged 6.23%, down from 6.30% last week, mortgage ‌finance agency ⁠Freddie Mac said on Thursday. It averaged 5.98% just before the ⁠U.S. and Israel attacked Iran at the end of February as Freddie Mac and ​Fannie Mae ​expanded purchases of ​mortgage-backed securities.

The rate ‌shot up to an average of 6.46% at the beginning of April. Mortgage rates track U.S. Treasuries, which have largely been range-bound amid lingering uncertainty over the ‌truce.

Trump on Tuesday indefinitely ​extended the ceasefire with ​Iran, though ​a U.S. Navy blockade of ‌Iranian ports remained in ​effect. On ​Thursday, Trump said he had ordered the U.S. Navy “to shoot and kill any ​boat” that ‌is laying mines in the Strait ​of Hormuz, lifting global oil ​prices.

(Reporting By Lucia Mutikani)