When one is under mourning period due to a death of a family member, unfortunately, if he receives a death news of someone known, can he go to their house for condolence when he himself is under mourning period?

General

Previous (When we grew up, whenever we used to receive a news of the death of a relative by Telegram or Phone, we used to take bath. Now-a-days, such news are conveyed in Whatsapp or SMS. How relevant and significant are those Baths we use to take as soon as we received the Bad news?)     |     Next (When the news of the death of a Blood relation reaches late to us, do we have to observe the mourning (Mahiligey) period)