FEODOSIA, Crimea (Reuters) - Two more gas turbines appear to have been delivered to Russian-controlled Crimea, according to two Reuters reporters who saw the equipment at the port of Feodosia, potentially deepening a row over sanctions compliance in which Germany’s Siemens has become embroiled.

A still image taken from a video footage shows blue tarpaulins covering equipment at the port of Feodosia, Crimea July 11, 2017. Video footage taken July 11, 2017. REUTERS/Staff

Reuters has no independent confirmation the equipment on the dock was Siemens-made turbines. It comprised four cylindrical objects, several meters long, and covered with blue and gray tarpaulins.

Their dimensions and shape match publicly-available photographs of Siemens gas turbine systems, which each consist of two major components: the turbine itself and a generator.

Siemens said earlier this week that at least two of a total of four turbines it sold to Russian state firm Technopromexport had been delivered to Crimea against its wishes and without its knowledge. Russia seized the region from Ukraine in 2014 and it is now subject to European sanctions on energy technology.

The German company filed a lawsuit against Technopromexport in Moscow on Tuesday requiring it to return the turbines to their original destination, Taman, Munich-based spokesman Wolfram Trost said.

Taman, in southern Russia, is not subject to sanctions.

On Wednesday, Yashar Azad, a spokesman for Siemens at its Bavarian headquarters, said the company was still trying to establish all the facts, including the location of the two other turbines, and had nothing to add to its previous statements.

When asked about the situation, Kremlin spokesman Dmitry Peskov told a conference call with reporters on Thursday that the gas turbines being installed in Crimea were of Russian origin.

“Equipment related to the power sector is indeed being installed there (in Crimea). The equipment being installed there is of Russian origin,” said Peskov.

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Technopromexport, the Russian state company building the Crimean power plants, and Russia’s energy ministry, declined to comment.

Asked if the pieces of equipment at the port were Siemens turbines, a government official in Crimea told Reuters: “Come on, we can’t talk about that. You understand: sanctions, Siemens.”

“Of course, this whole story is going to come out, but let it come out without us,” said this source, who did not want to be identified because of the sensitivity of the issue.

If the equipment that arrived in Feodosia is Siemens-made, it would show that Russia is pressing ahead with its plan, despite the Siemens lawsuit and a warning this week from the German government that the use of Siemens turbines in Crimea could harm future German investment in Russia.

In the early hours of Thursday morning, two low-loader trucks carrying two of the pieces of equipment emerged from the port and set off in the direction of the Crimean city of Simferopol.

Russia plans to install Siemens turbines at a power plant under construction in Simferopol, three sources close to the project told Reuters earlier this month.

The slow-moving convoy was escorted by police vehicles, and police officers in body armor walked alongside the trucks on either side. Police and state security agents prevented a Reuters journalist from following the convoy.

The turbines affair has shone a harsh spotlight on how serious the European Union, its member states, and European companies are about enforcing the sanctions, imposed on Russia after it annexed Crimea from Ukraine in 2014.

Siemens said on Monday it did everything possible to ensure compliance with sanctions.

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Russia said in 2015 it needs four turbines in total for new power stations on the Crimean peninsula, which Ukraine cut from its electricity grid after it lost control. President Vladimir Putin promised the region’s residents last year that he would ensure a stable power supply.

Two of the turbines are for a power plant under construction in the city of Sevastopol, and the other two for a plant being built in Simferopol.

On Tuesday, workers could be seen around the equipment at Feodosia port dressed in blue uniforms. Reuters reporters had observed the same uniforms on workers at Crimea’s Simferopol and Sevastopol power stations, where, according to the three sources, Siemens-made turbines are to be installed.

Siemens has said the two turbines it has confirmed had been transferred to Crimea had been among four sold to Technopromexport for use in a proposed power plant in Taman. Taman is on the Russian mainland 10 km (8 miles) east of Crimea across the Kerch Strait.

A source close to the Crimea power plants project told Reuters last week, on condition of anonymity, that the plan was to deliver the second set of two turbines produced by Siemens to Feodosia port this month.

(For a graphic on impact of EU sanctions on trade with Russia, click tmsnrt.rs/2tPxMMR)