The wounded Kosciuszko was taken prisoner, and Aleksandr Suvorov's Russian army carried out a wholesale massacre of the population in the Warsaw suburb of Praga.

http://en.wikipedia.org/wiki/Massacre_of_Praga
Battle
The Russian forces reached the outskirts of Warsaw on November 3, 1794. Immediately upon arrival, the Russian forces started artillery barrage of the Polish defences. This made the Polish commander think that the opposing forces were preparing for a long siege. However, Suvorov's plan assumed the fast and concentrated assault on the Polish defences rather than a bloody and lengthy siege.
On 3 o'clock in the morning of November 4 the Russian troops reached the positions just outside the outer rim of Polish field fortifications and two hours later started an all-out assault. The Polish defenders were completely surprised and soon the Polish lines were broken onto several isolated pockets of resistance. General Zajączek was slightly wounded and retreated from his post, leaving the remainder of his forces without command. This made the Poles retreat towards the centre of Praga and then towards Vistula. The heavy city fights lasted for four hours and resulted in a complete defeat of the Polish forces. Only a small part managed to evade encirclement and retreated to the other side of the river across a bridge.
Massacre
After the battle ended, the Russians started to loot and burn the entire borough of Warsaw in what was seen as a bloody revenge for the earlier near annihilation of the Russian Garrison in Warsaw during the Warsaw Uprising in April 1794, where about 4,000 Russian soldiers died[7]. Almost all of the area was pillaged, burnt to the ground and many inhabitants of Praga district were murdered. Exact death toll of that day remains unknown, yet it is estimated that between 10,000-20,000 civilians were killed. Suvorov himself wrote that: "The whole of Praga was strewn with dead bodies, blood was flowing in streams."[8]
http://www.answers.com/topic/yemelyan-pugachev#after_ad2
http://www1.yadvashem.org/odot_pdf/Microsoft%20Word%20-%206169.pdf

Eventually, in October, the combined strength of Russia and Prussia defeated Kosciuszko's forces at Maciejowice (where he was captured) and, in November, Warsaw was taken by the Russians who slaughtered the population of the suburb, Praga, including women and children.

Kosciuszko suffered a defeat at Macieyowice and, seriously wounded, was captured by the Russians on October 10, 1794. The news of his capture threw the country into despair. Meanwhile, Suvorov approached Warsaw and began to bombard its suburb, Praga, situated on the right bank of the Vistula. On November 4th Praga was taken and its population was literally slaughtered by the bloodthirsty soldiery. About fifteen thousand persons were butchered and many more thousands maimed. Until this day Polish mothers frighten their children with the name of Suvorov. The next day the capital fell. Wholesale executions, arrests and exiles to Siberia followed. The immense estates of the Crown and those of the participants in the revolution were confiscated and divided among Russian generals and the Polish traitors who had sold their country. Prussia and Austria proceeded in a similar manner, the latter forcing thousands of Polish, refugees into ranks of he depleted army.