>> we keep calm. we listen to music. we try to get, like, good mood. >> reporter: try to stay positive. >> stay positive. >> reporter: the overnight curfew that had been in place has now been extended from 5:00 p.m. today to 8:00 a.m. on monday. ukrainian security teams are checking everyone on the lookout for russian saboteurs. when we were out on the streets today, we came across very jittery ukrainian checkpoint guards. they had their guns drawn, even on us. everybody here is on edge. the mayor says anybody caught outside between now and monday morning will be considered an enemy. adriana. >> diaz: charlie d'agata in kyiv, thank you. today, france intercepted and seized a russian cargo ship in the english channel. the ship was suspected of breaching new international sanctions. on board, a cargo of new cars bound for st. petersburg. president biden spoke with his