Kenyan army spokesman Col Cyrus Oguna said a joint operation of Kenyan and Somali government troops was launched overnight and was "basically amphibious".
"We cannot give casualty figures at the moment, the damage has not been assessed, but I can tell you our forces are already in Kismayo."
More top news
The current and former First Ladies praised one another's record and experience - before criticising Republican Donald Trump on both fronts.
After Twitter announced it is to axe its video sharing service Vine, we took a look at some of the more memorable six second video clips.
Three people have been arrested and charged in connection with violence between West Ham and Chelsea fans at the former Olympic stadium.