Extra police officers are on the streets of South Yorkshire today in the wake of the London terror attack.
Police chiefs today ordered extra officers onto the streets to provide a visible presence as a form of reassurance.
Extra patrols have also been ordered, although South Yorkshire Police has stressed there is no 'specific information suggesting there is a threat' to the county.
A police officer was stabbed to death and a man and woman were mown down in a terror attack in Westminster yesterday afternoon.
PC Keith Palmer was knifed attempting to prevent a man storming the Houses of Parliament just moments after a car was driven along Westminster Bridge ploughing into pedestrians.
Isis has claimed responsibility for the attack, for which eight arrests have been made so far.
Chief Constable Stephen Watson, of South Yorkshire Police, said: “Our thoughts go out to all those affected in yesterday’s events in Westminster and we offer our deepest condolences to the family and friends of those who lost their lives and have suffered injury.
“We are also particularly saddened at the news of the passing of PC Keith Palmer, who died in the brave execution of his duty.
“To provide reassurance to the public there will be a more visible police presence across South Yorkshire with increased patrols throughout the county.
"While there is no specific information suggesting there is a threat to South Yorkshire at this time, I do want to remind the public to be alert, but not to be alarmed.”
The man responsible for yesterday's terror attack died after he was shot.