Berlin's Adlon hotel, from where Michael Jackson famously dangled his baby son from a balcony, expressed its condolences on Friday at the death of their former guest.

"We greatly regret his death," said the hotel's spokeswoman Sabine Kalkmann, adding that the Adlon was not able to comment further for reasons of discretion.

Ferrari has ruled itself out as an automatic entry in the list of teams for Formula One racing next season in no sign of an agreement in a budget-cap conflict which threatens to tear the sport apart.

Motorsport federation FIA will officially unveil its 13 teams with 26 drivers for next season on Friday.

With just 10 weeks to go until the start of the World Athletics Championships in Berlin, organizers say they are happy with how ticket sales for the event are progressing.

Germany looked back on 60 years of its history on Friday, as the country marked the anniversary of its post-war constitution.

The nation's political elite attended an act of state at a Berlin concert hall ahead of a day-long public festival near the landmark Brandenburg Gate on Saturday.

Berlin's central Kreuzberg district cleaned up Saturday after a night where leftist and minority youths battled for hours with riot police under cover of darkness in an annual May Day ritual that began in 1987. The Berlin riot began Friday evening when about 400 masked militants in a crowd of 5,000 anti-capitalist demonstrators began hurling stones and bottles soon after the parade began. Police dispersed the crowd and tried to catch the offenders.

Vaccinations can alleviate the symptoms of hay fever when conventional methods such as nasal sprays, eye drops and antihistamines fail, according to Germany's Berlin-based Professional Association of Dermatologists.

This form of treatment is called immunotherapy and should be initiated weeks in advance of pollination.

Those who are allergic to the pollen of the hazel and alder trees, which blossom in early spring, should begin a course of immunotherapy in autumn.

Stress is almost guaranteed when flying with a baby. But many parents find the hunt for a child safety seat, acceptable to international airlines and in compliance with various government guidelines, even more stressful.

Making the wrong choice can mean reserving a seat, buying or renting a safety seat and then learning just before takeoff that the seat does not pass muster. But not making the effort could mean foregoing basic safety precautions, some experts say.

Police and demonstrators have been flexing their muscles in the run-up to this week's summit celebrating the 60th anniversary of the founding of NATO.

Around 150 anti-NATO campaigners clashed with police Tuesday night on the outskirts of the French city of Strasbourg, co-host to the April 3-4 gathering along with Kehl and Baden-Baden in Germany.

Police used tear gas to disperse the protesters who had gathered to voice their anger at the strict identification checks imposed to prevent troublemakers from disrupting the summit.