Despite Violence Mexican Mid Term Elections Take Place Sunday

There has been further violence around Mexico as the country prepares for this weekend's mid-term elections.
A radical teachers' union attacked the offices of five political parties in Chiapas state in the south of the country.
Meanwhile in Guerrero state, explosive devices were thrown into a conservative party's office.
A number of candidates and numerous campaign workers have also been killed in drug-related violence.
On Sunday, Mexican voters will choose Congressmen, governors and mayors.
Despite the unrest, electoral officials say the elections will go ahead on Sunday.