LISBON (Reuters) - Portugal on Thursday announced an expansion of a nightly curfew and weekend lockdown already in place across more than 100 municipalities to a further 77 areas as it scrambles to contain the spread of the coronavirus pandemic.“The situation is serious and more critical than what we experienced in the first wave of the pandemic,” Prime Minister Antonio Costa told a news conference. Residents of affected areas are asked to not leave the house except for work, school or shopping during the week, and must stay home between 11 p.m. and 5 a.m. At weekends, a lockdown is in place from 1 p.m. to 5 a.m., during which all commercial outlets and restaurants must shut, although there are exceptions for bakeries, pharmacies and neighbourhood grocery shops.