(CNN) Spent fuel rods containing radioactive material may have burned in Tuesday's fire at the Fukushima Daiichi nuclear plant - causing a spike in radiation levels, the plant's owner said.
The blaze started Tuesday morning but was later extinguished, Tokyo Electric Power Company said. It was unclear how much radioactive material may have been emitted, or what kind of health threat that could pose.
Glenn Sjoden, Nuclear Engineering Professor at Georgia Tech University, talks to Kiran Chetry and Christine Romans about the potential effects of the blasts.