Please see up-to-date information on this article here. These two incidences are now believed not to be related.
A spokeswoman at the JFK library has said that there have been no injuries there. People at the library are reporting to CBS news that there was a mechanical fire at the library. This information is still developing.
Please note that these incidents do not appear to be related.
"Boston authorities also said on police scanner that another explosion had taken place at the JFK Presidential Library. However, the Dorchester Reporter said director of the library reported a fire inside the building was not caused by a device and not related to the marathon explosions."
We will keep you posted on this development. Again, it is not clear if these two incidents are related.