Obama: catch or kill bin Laden | Peres: Obama brings Iran talks hope | What about new dog? | Obama gives up his BlackBerry

Barack Obama’s election as America’s first black president has unleashed a wave of hate crimes across the nation, according to police and monitoring organisations.

Far from heralding a new age of tolerance, Mr Obama’s victory in the November 4 poll has highlighted the stubborn racism that lingers within some elements of American society as opponents pour their frustration into vandalism, harassment, threats and even physical attacks.

Cross burnings, black figures hung from nooses, and schoolchildren chanting “Assassinate Obama” are just some of the incidents that have been documented by police from California to Maine.

There have been "hundreds" of cases since the election, many more than usual, said Mark Potok, director of the Intelligence Project at the Southern Poverty Law Center, which monitors hate crimes.

The phenomenon appears to be at its most intense in the Southern states, where opposition to Mr Obama is at its highest and where reports of hate crimes were emerging even before the election. Incidents involving adults, college students and even schoolchildren have dampened the early post-election glow of racial progress and harmony, with some African American residents reporting an atmosphere of fear and inter-community tension.

In North Carolina, four students at the state university admitted writing anti-Obama comments in a tunnel designated for free speech expression, including one that said: "Let's shoot that (N-word) in the head." Mr Obama has received more threats than any other president-elect, authorities say.

Marsha L. Houston, a University of Alabama professor, said a poster of the Obama family was ripped off her office door. A replacement poster was defaced with a death threat and a racial slur. "It seems the election brought the racist rats out of the woodwork," Ms Houston said.

Second and third-grade students on a school bus in Rexburg, Idaho, chanted "assassinate Obama," a district official said.

Meanwhile in Snellville, Georgia, Denene Millner, an African-American, said a boy on the school bus told her nine-year-old daughter the day after the election: "I hope Obama gets assassinated." That night, someone trashed her sister-in-law's front lawn, mangled the Obama lawn signs, and left two pizza boxes filled with human faeces outside the front door, Ms Millner said.

She described her emotions as a combination of anger and fear.

"I can't say that every white person in Snellville is evil and anti-Obama and willing to desecrate my property because one or two idiots did it," Ms Millner said. "But it definitely makes you look a little different at the people who you live with, and makes you wonder what they're capable of and what they're really thinking."

Times Recommends

• Mandela’s tribe threatens President Zuma
• The French empire strikes back
• Wife of cheating governor exacts a political revenge