VILNIUS, U.S.S.R., JAN. 18 -- Lithuanian President Vytautas Landsbergis said today he had received U.S. assurance of support for his Baltic republic, which is resisting a crackdown by Soviet troops.

In Washington, President Bush told a news conference he had spoken with Soviet President Mikhail Gorbachev and called for a peaceful solution in the Baltics.

In the Baltic republic of Estonia, residents of the capital, Tallinn, blocked roads to the hilltop parliament building with stone barricades. Russian-speaking workers pressing the Estonian government to resign went on strike at 16 large factories, a news report said.

Soviet forces have seized several key buildings in Lithuania, which declared independence in March. Thirteen people were killed in a Soviet military assault on the Lithuanian broadcast center early Sunday.

The three Baltic republics -- Lithuania, Estonia and Latvia -- were independent between the two world wars. Estonia and Latvia are also seeking independence, but they have been more restrained in their efforts than Lithuania.

At an evening news conference, Landsbergis said he had met with George A. Krol, the U.S. consul based in Leningrad. "The United States guarantees that at this time in our crisis, the United States is on our side," Landsbergis said.

The U.S. diplomat told him the United States supports a peaceful settlement in Lithuania, Landsbergis said.

In his remarks to reporters, Bush said he had discussed the situation in the Baltics with Gorbachev by telephone.

"I took the opportunity . . . from that call to express again my concern, my deep concern over the Baltics, and the need to ensure that there is a peaceful resolution to the situation there," Bush said.

Bush administration officials, speaking on condition of anonymity, said the Kremlin had raised tensions in the Baltics with false and biased press and television accounts. Their coverage "has done a great disservice to the Soviet people and has served to exacerbate an already difficult situation," one official said.

The officials cited as an example Soviet reports that Lithuanians guarding the television tower in Vilnius fired first on the Soviet troops. Witnesses, including Western reporters, contradicted those reports.

{Soviet troops detained a Lithuanian member of parliament, Vidmantas Povilionis, in Vilnius overnight, Reuter reported. He was released without explanation Friday morning, but military units patrolled all roads in and out of the capital.}

In Brussels, Lithuania's foreign minister said today that Western nations are just "talking about democracy" while letting the Soviet government victimize his Baltic republic. Foreign Minister Algirdas Saudargas made the charge while speaking to members of the European Parliament.