Yes it is correct. The word could also be placed at the end of the sentence.
Interested in Language
Do you find the place of the word "today" correct: "In addition, Serzh Sargsyan today visited the Embassyof the United Kingdom in the Republic of Armenia."
It could also be place between "In addition" and "Serzh", with a comma on each side.
In addition, today, Serzh ...
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.