London ( CNN ) -- Police are investigating whether anti-Muslim sentiments were behind a fire early Wednesday that caused extensive damage to a Somali community center in north London . The fire , in the Muswell Hill neighborhood , is being treated as suspicious , the Metropolitan Police said in a statement . Police told CNN that investigators will probe whether the attack may have been directed against Muslims . The letters `` EDL '' -- a possible reference to the English Defence League , a far-right group -- were found on the building , the statement said . `` Police are investigating any potential connection between the graffiti and the fire . '' The force `` will work closely with the Somali and Islamic communities to provide support and reassurance , '' the statement said . The Met 's Counter Terrorism Command is leading the inquiry . Emergency services were called to the fire at the Somali Bravanese Welfare Association at 3:23 a.m. Opinion : Anti-Muslim backlash in England , but not here . One woman was treated for injuries not suffered in the fire , police said . Community leaders said they and the center had co-existed peacefully for 20 years , Chief Superintendent Adrian Usher told reporters . Police will increase patrols in the area , he said . No one has been arrested . Tensions in the metropolitan area have been heightened since May 22 , when a soldier , Lee Rigby , was killed in Woolwich in southeast London . Two men have been charged with murder in the case . The English Defence League has staged protest marches in London and elsewhere . The group says that Islamic law is poised to overthrow British society and calls for Britons to act aggressively to pre-empt it . Cressida Dick , assistant commissioner for the Metropolitan Police , told lawmakers Tuesday that hate crime reports rose after the Woolwich attack but had since declined . She told the House of Commons Home Affairs Committee that some `` horrible attacks on mosques '' had taken place , but she was not aware of any assaults on people . The spike in reported crimes was less than spikes that followed the 9/11 attacks in the United States and the 2005 bomb attacks on London 's transport system , she added . CNN 's Erin McLaughlin and Alexander Felton contributed to this report .
The Somali community center was extensively damaged . Graffiti apparently written by a far-right group was found on the building , police say . Police will boost patrols in the area , a senior officer says .