Sirens went off in some Polish cities early Sunday to mark the anniversary of the 2010 presidential plane crash

the plaintive character of observances honoring late President Lech Kaczynski, the first lady and 94 other prominent Poles killed

The sirens were heard at 0641 GMT, the exact time the presidential plane crashed on April 10, 2010, near Smolensk, Russia

Kaczynski was the twin of Jaroslaw Kaczynski who is the leader of the main ruling Law and Justice party and Poland’s key politician. The brothers founded the party in 2001

Jaroslaw Kaczynski and party figures were at the monuments to the late president and to all the victims, in downtown Warsaw

Provincial governors, who represent the central government, ignored widespread calls of concern for refugees from neighboring Ukraine

The authorities were sending text messages to refugees' phones and posting public warnings that the sirens would mean no danger

For more stories