MAZAR-I-SHARIF, Afghanistan (AFP) - A suicide bomber on a bicycle struck Mazar-i-Sharif on Wednesday, killing four Afghans in one of the country's safest cities poised to transition from NATO to local control. The attack will likely fuel fears that putting Afghan security forces in control of seven different areas this week is happening too quickly, with violence at a record high in the decade-long Taliban insurgency. Police and ministry officials said 11 people were wounded in the explosion close to the northern city's famous Blue Mosque.