<text>  A teenage girl has been beaten to death and set on fire in a Nigerian market after being accused of being a suicide bomber. Police officers said a second suspected teenage girl was also accused of being a suicide bomber and was arrested at the Muda Lawal market, the biggest market in Bauchi city in north east Nigeria. A yam vendor said people discovered one of the girls had two bottles strapped to her body so they clubbed her to death, put a tyre doused in fuel over her head and set it on fire. Scroll down for video . Police said the girl was accused of being a suicide bomber and clubbed to death before being set on fire by the crowd at the market in Bauchi, Nigeria - pictured are the schoolgirls Boko Haram kidnapped last year . Market trader Mohd Adamu said the girls refused to be searched at the gate of the vegetable market, arousing suspicion from the people who attacked them. But police spokesman Mohammad Haruna said it seemed doubtful the girl was a bomber and described her as the victim of mob action carried out by an irate crowd. A spate of such attacks has been blamed on Nigerias homegrown Boko Haram extremist group, which wants to enforce strict Islamic law across Nigeria. Last year the terror group kidnapped hundreds of schoolgirls from the town of Chibok - sparking fears they are being used to carry out the suicide bombings. A vehicle used by Boko Haram set ablaze by Nigerian troops near the town of Baga, north-eastern Nigeria . Nigerian President Goodluck Jonathan pictured right shakes hand with a military officer on his arrival at the town of Baga, which was the scene of Boko Harams worst massacre to date . Boko Haram carried out its first suicide bombing in 2011 - its a relatively new tactic for the terror group. The first female suicide bombing was reported in June 2014 when a middle-aged woman blew herself up at army barracks in Gombe, northeast Nigeria. This incident was the first in a wave of suicide attacks by women and girls in Nigeria. There were then six such attacks in six weeks. Since November there have been several attacks by female suicide bombers each month. In total, 27 women and girls have reportedly been involved in suicide attacks in the country. In 2014, Nigeria saw around 85 percent of all female suicide bombings around the world. The group has increased the number of suicide attacks over the last year, particularly those involving girls and women. Recently girls as young as 10 have been used to carry explosives which were then detonated in busy markets and bus stations. It is unclear whether the girls detonate explosions themselves or whether the bombs are controlled remotely. President Goodluck Jonathan last week condemned Boko Haram for choosing soft targets and said the series of bombings are a response to the Nigerian militarys recent success in seizing back towns that had been in the hands of the extremists for months. The group has threatened to disrupt Nigerias March 28 presidential and legislative elections, saying democracy is a corrupt Western concept. Several thousand people took to the streets of Cameroons capital yesterday to denounce Boko Harams bloody insurgency and to call for the killing of the groups leader Abubakar Shekau. Several thousand people protested in Yaounde, Cameroon to denounce Boko Harams bloody insurgency . Cameroonian people gather to protest against Boko Haram in Yaounde, Cameroon, yesterday . People hold Chadian and Cameroonian flags during the march in support of the Cameroonian armys war against Boko Haram . The march in Yaounde was aimed at informing the public, especially in the southern regions, about the threat posed by Boko Haram, which has carried out regular cross-border raids in the far north . This march symbolises Cameroons unity against Boko Haram, the countrys Labour Minister Gregoire Owona told marchers in Yaounde, before shouting Shekau! In response, the crowd of 15,000, chanted: You are dead, you are a coward. Over the past seven months Cameroonian soldiers have been battling the Nigerian Islamists, which are now locked in a regional fight that also includes soldiers from Nigeria and Chad. Boko Harams six-year insurgency, which has left 13,000 dead and forced over a million from their homes, has increasingly spilled over into neighbouring nations. Several ministers led the vocal, but peaceful march, which saw protesters waving the flags of Cameroon, Chad and Nigeria. 