There are once again questions about Russian President Boris Yeltsin's health after he swayed and nearly fell over during a military ceremony in Uzbekistan.
Another welcome ceremony in which he was due to take part, was cancelled.
Talks with Islam Karimov, president of Uzbekistan, were later held behind closed doors at a government residence.
Yeltsin's spokesman said the Russian president had had a "difficult flight" and had caught at cold.
Yeltsin is on a two day visit to the central Asian republic of Uzbekistan.
As so often with the Russian leader, international crises were put on the back burner as doubts about his health took centre stage once more on Sunday.
Yeltsin was seen to visibly stumble when he arrived in the Uzbekistan capital, Tashkent.
He leant on the arm of President Karimov for support as he crossed the tarmac and later waved to the cameras.
But more was to follow.
Yeltsin was uncomfortable on his feet as he and Karimov stood side by side while the national anthems were played.
An aide dashed closer to the Russian leader when it looked at one point as if he was going to fall over.
After the ceremony, Karimov immediately took Yeltsin's arm as they walked away over the tarmac.
A wreath laying ceremony at a monument to a national hero of Uzbekistan was cancelled.
Kremlin spokesman Dmitry Yakushkin said the Russian president was suffering from a cold after having been through a tough working week.
"I have to say I have spent the whole week with Boris Nikolayevich (Yeltsin). He has had a very busy working week, and that is why I am holding this briefing. Some of you were present at these meetings. It was a hard flight and not an easy end to his working week. I have to say he has a cold.
SUPER CAPTION: Dmitry Yakushkin, Kremlin spokesman
The 67-year-old president, who had a quintuple heart bypass, is facing an economic crisis and labour unrest at home while on the international front the crisis in Kosovo poses a serious challenge to Russia's international relations.
You can license this story through AP Archive: http://www.aparchive.com/metadata/youtube/d05ed3b47f3717ff0ee3b12e9d950ce8
Find out more about AP Archive: http://www.aparchive.com/HowWeWork
I.A.Karimovga xudo tomondan berilgan prezdentlik no oxirgi 7 yilda boshqaruv izdan chiqandi SH.M.Mirziyoyevdan qashoqa aylanib qolgan uzbek xalqni oyoqa tiklashlarida rassiyagamas ruslar uzbekistonda borib ishlashni orzu qilish darajasiga etkazishlarini surab qolardim
Елцинь гавно алкаш разволил страну а ему музей памитник поставили руских не понят далбаеву памитник паставили бля охуеть кто на каления поставит страну ему памитник паставит эти руские бесчестье руским
иди ка ты нахуй, безграмотный. Какой бы он ни был, он был нашим. И не вам нас судить. Вы в собственном говне поначалу понимать научитесь без сторонних.
А монумент ему стоит в Екатеринбурге( Свердловске), для которого он весьма немало неплохого сделал.
Patients taking Viagra are less likely to suffer a heart attack, new research claims.
Men taking the impotence drug were found to have a lower risk of having a heart attack or dying from heart failure than those not on the medication.
The findings mean Viagra could soon be used to treat hundreds of thousands of heart failure patients and even prevent fatal heart attacks, scientists say.
Experts from the University of Manchester studied 6,000 diabetic patients who had been given Viagra to treat erectile dysfunction.
The drug relaxes muscle cells in the blood vessels supplying the penis, allowing more blood to flow there.
This increased blood flow increases the likelihood of getting an erection.
Given the increasing reports of deaths in which the use of Viagra may be implicated, clinicians need to exercise caution when advising their patients with heart
Experts believe a key ingredient in Viagra called PDE5i, which relaxes blood vessels, also prevents damage to heart cells.
Heart failure is caused by the heart failing to pump enough blood around the body at the right pressure.
It most often occurs because the heart muscle has become too weak or stiff to work properly and is usually treated with medication which supports the heart.
Despite diabetics being prone to heart problems, the study participants did not suffer as many incidents as similar patients not on the drug.