BY MATTHEW ALBRIGHT | Staff writer A seven-year-old girl was killed in a dog attack last night. Here's what we know about what the sheriff called "an awful, heartbreaking tragedy" — we're working to find out more information about what happened. Drivers saw something weird on I-10 in the Prairieville and Gonazles area last night: a long line of fires that appeared to burn for miles. Firefighters were able to extinguish the strange conflagration safely, but it's not clear what caused it. Here's what we know. Liam Dunn is fighting for his life, the West Baton Rouge Sheriff's Office says. He was badly injured in the crash during a police pursuit that killed his sister and another girl. One of the main things Dunn needs now is blood donations, the sheriff said. Here's information about how to help. | 