A police log indicates that the 14-year-old boy who was struck and killed on Interstate 93 in New Hampshire had been arguing with his mother. State Police said the boy’s mother pulled over in the breakdown lane on the northbound side in Londonderry on Wednesday afternoon. The Eagle-Tribune reported that the police log said the mother called 911 and told the dispatcher that her son had left the car and had run into the woods. She said he ran back into the road, where he was struck by another vehicle. State Police Captain John LeLacheur said it is possible the two were arguing. The log referred to the mother as ‘‘having a domestic’’ with her son. The boy was struck by a car driven by Griffin George, 28, of Derry.