The warning was issued by a top Iranian official as the country prepares for a funeral for its former top leader, Ali Khamenei.
Median monthly housing payments registered their first annual increase since last October, hitting $2,633.
Historians hail the significance of the finding, announced just before the 250-year anniversary of American independence from British rule.

The project will not be receiving an $80 million tax break from the Orange County Industrial Development Agency.
Protesters denounced Beijing’s rule and a new ‘ethnic unity’ law they say expands the Chinese regime’s transnational repression.
The 47th president and a fifth-generation company are marking the nation’s 250th birthday with a history-making program at the iconic South Dakota sculptures.
Six of the 10 cities are in central California, while the other four cities are in Texas.
After ‘full-blown shopping’ Brown and lots of debate over his true value, Boston finalizes a trade with Philadelphia for Paul George and four picks.
The Air Force said it treats misconduct allegations seriously, including those that may undermine the military’s nonpartisan nature.

Police are still investigating the incident.
The Homeland Security Department report lists communications failures and security lapses that led up to the gunman opening fire from a rooftop.
Steady bond prices, amid lower oil prices and a cooling labor market, have supported a rotation of investment from leading sectors into lagging sectors.
David Hearn was indicted in Washington on one count of property destruction related to an incident that occurred on June 19.
‘Today’s decision allows these products to be marketed with a modified risk claim,’ an official said.
The president and lawmakers believe there could be a way to end birthright citizenship, while experts who spoke to The Epoch Times cast doubt on all options.
Three other members of the MH-60S Sea Hawk flight crew have been safely recovered.
A B-2 Spirit stealth bomber launched a stealthy AGM-158C long-range anti-ship missile in a live-fire ship-sinking exercise on June 27.
The Education Department defended the rule as a safeguard against taxpayers subsidising workers at organisations involved in ‘illegal activities.’
U.S. officials said the alleged scheme relied on shell companies and false customs paperwork to evade Mexican fuel taxes.
The Republican primary, between All Things Possible Ministries founder Victor Marx and state Sen. Barbara Kirkmeyer, is too close to call.
From rifle rounds to grenade systems, industry players are ramping up efforts to meet rising demand for battlefield drone defense.