Hamed Nour-Mohammadi, a second-year molecular biology student at Shiraz University (I had initially written that he was a fourth-year biology student), was thrown off Namazi Bridge in the southern Iranian city of Shiraz, eyewitnesses said.
View Namazi Bridge, Shiraz, Iran - 20 February 2011 in a larger map
Nour-Mohammadi resided at the Dastgheib university dormitory and was a native of Khorramabad, Lorestan province, wrote the opposition Jaras web site (NB He may have been from the town of Alashter, see below). His family is under intense pressure from security authorities to remain silent.
Sources in Iran reported that another protester was shot to death in Tehran's Haft Tir Square, but no details have been forthcoming.
Yesterday's marches were called to commemorate the deaths of two demonstrators, Mohammad Mokhtari and Saneh Jaleh, on February 14.
Update
The semi-official Fars News, close to the IRGC, reported that Nour-Mohammadi was not a protester and that he had died as a result of being run over by a car in a banal road accident.
I came across the following comment on Radio Farda's web site (I've translated it from the original Farsi):
I am a friend of Hamed and come from the same town
Hamed is from Alashtar (NB also in Lorestan province), not Khorramabad
As I'm writing this, I can't even see the computer screen through my tears
My hand is trembling
You mean Hamed?
They killed our Hamed
Hamed I salute you
I salute your sense of honor
[...]
Hamed was a true Green
a true patriot
he loved the sunset over Persepolis
That's why he chose Shiraz University (NB Shiraz is close to the ancient Persian capital of Persepolis)
My Hamed, your friends and I will continue on your path
I can't believe it
Just a week ago you said, I'm off to Shiraz, let me take a photo of you.